Blood collection systems · MCS+ family

Haemonetics MCS+ LN 9000: troubleshooting and error codes

The ServiceForge knowledge base holds 122 documented symptoms for the Haemonetics MCS+ LN 9000, with 217 ranked causes, 244 diagnostic checks with test points and expected values, and 205 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Protocol door open

System detects protocol card door is open and displays error 262

Ranked causes

1. Protocol door not closed (common)
2. Door microswitch failure (occasional)
3. Microswitch cable fault (occasional)
4. Ribbon cable failure (occasional)
5. Power supply failure (rare)
6. Processor PCB defect (rare)

First check

Visually confirm protocol door position

Test point: Protocol Card door
Expected: Door fully closed

5 more checks with pass and fail actions, 6 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Return cycle not completed patient safety

System displays error 389 when return cycle incomplete; bowl not empty or BLAD air signal detected early

Ranked causes

1. Bowl not completely emptying, viscous RBCs from over-centrifugation (common)
2. BLAD malfunction (occasional)
3. BLAD electrical connection failure (occasional)
4. BLAD signal measurement out of specification (occasional)
5. ACAD failure (occasional)
6. Processor PCB failure (rare)

First check

Review centrifugation settings for current procedure

Test point: Procedure parameters
Expected: Centrifugation settings normal for blood type

3 more checks with pass and fail actions, 6 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Low yield or poor product quality patient safety

Procedures result in low yield, WBC contamination, RBC contamination, or poor product volumes

Ranked causes

1. Suboptimal machine parameters or settings (common)
2. Rotor not properly seated (occasional)
3. Bowl optics or sensor signal degradation (occasional)
4. Optics aiming volume misalignment (occasional)
5. Bowl vibration issue (occasional)

First check

Confirm specific complaint from customer

Test point: Patient/donor record
Expected: Document precount, draw rate, hematocrit, volume processed, flow performance, ACD used, disposable lot number

10 more checks with pass and fail actions, 6 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Blue valve detected out of position patient safety

Blue valve did not respond to command and remains in incorrect position

Ranked causes

1. Valve solenoid power or control signal is incorrect (common)
2. Valve is mechanically stuck or failed (common)
3. Valve Driver PCB or Processor PCB is defective (occasional)
4. Valve compressor pneumatic pressure is low (occasional)

4 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Card disposable mismatch

System displays error 372 when card does not match disposable

Ranked causes

1. Incorrect card-disposable pairing (common)
2. Disposable ID sensor malfunction (occasional)
3. Cable fault PCB to top deck (occasional)
4. Disposable ID PCB failure (occasional)

First check

Visually verify card and disposable compatibility

Test point: Card and disposable labels or markings
Expected: Card and disposable IDs match

2 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Centrifuge cover is not locked patient safety

Centrifuge cover latch switches indicate cover is open or unlocked at start or during draw cycle

Ranked causes

1. Centrifuge cover halves not completely closed (common)
2. Cover latch microswitch misalignment (common)
3. Electrical connections to cover switch signals are damaged (occasional)
4. Advanced Processor PCB is defective (rare)

4 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

DPM pressure out of range

System displays error 345 when DPM pressure measurement exceeds acceptable range

Ranked causes

1. DPM pressure at limits due to operational conditions (common)
2. DPM calibration error (occasional)
3. Safety system configuration issue (occasional)
4. DPM PCB or assembly failure (occasional)

First check

Close needle clamp and operate blood pump

Test point: Needle clamp, Red valve, Blood pump
Expected: Needle clamp closed, Red valve open, pump rotates clockwise

2 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Interlock failure between SPM and DPM

System displays error 370 when interlock failure detected between SPM/DPM

Ranked causes

1. Electrical connection failure in DPM or SPM circuit (common)
2. Filter sleeve not properly installed (common)
3. DPM or SPM assembly defect (occasional)
4. Motor driver PCB failure (occasional)

First check

Inspect DPM and SPM electrical connections

Test point: All connections per system schematic
Expected: All connections secure and undamaged

3 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

No donor pressure change detected at DPM

System displays error 373 when no donor pressure change detected at DPM

Ranked causes

1. DPM tubing occlusion or clamp (common)
2. Wet DPM filter (common)
3. DPM calibration error (occasional)
4. DPM PCB or assembly failure (occasional)

First check

Inspect DPM tubing for occlusions or clamps

Test point: DPM tubing line
Expected: Clear tubing with no blockages or clamps

2 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

No pressure change detected at DPM

System displays error 343 when DPM cannot detect venous pressure change

Ranked causes

1. Donor tubing occlusion or clamp (common)
2. Wet DPM filter (common)
3. DPM calibration error (occasional)
4. DPM assembly failure (occasional)

First check

Inspect donor tubing for occlusions or clamps

Test point: Donor tubing line
Expected: Clear tubing, no blockages or clamps present

2 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

No pressure change detected at SPM

System displays error 344 when no pressure change detected at the SPM

Ranked causes

1. SPM tubing occlusion or clamp (common)
2. Wet SPM filter (common)
3. SPM calibration error (occasional)
4. SPM PCB or assembly failure (occasional)

First check

Inspect SPM tubing for occlusions or clamps

Test point: SPM tubing line
Expected: Clear tubing with no blockages or clamps

2 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

No system pressure change detected at SPM

System displays error 374 when no system pressure change detected at SPM

Ranked causes

1. SPM tubing occlusion or clamp (common)
2. Wet SPM filter (common)
3. SPM calibration error (occasional)
4. SPM PCB or assembly failure (occasional)

First check

Inspect SPM tubing for occlusions or clamps

Test point: SPM tubing line
Expected: Clear tubing with no blockages or clamps

2 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Orange valve detected out of position patient safety

Orange valve did not respond to command and remains in incorrect position

Ranked causes

1. Valve solenoid power or control signal is incorrect (common)
2. Valve is mechanically stuck or failed (common)
3. Valve Driver PCB or Processor PCB is defective (occasional)
4. Valve compressor pneumatic pressure is low (occasional)

4 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Prime flow control problem

System displays error 351 when no flow detected due to high pressure or vacuum at DPM

Ranked causes

1. High pressure or vacuum condition at DPM (common)
2. DPM calibration error (occasional)
3. Safety system values incorrect (occasional)
4. DPM PCB or assembly failure (occasional)

First check

Adjust needle clamp and blood pump operation

Test point: Needle clamp, Red valve, Blood pump
Expected: Needle clamp closed, Red valve open, pump clockwise

2 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Purple valve detected out of position patient safety

Purple valve did not respond to command and remains in incorrect position

Ranked causes

1. Valve solenoid power or control signal is incorrect (common)
2. Valve is mechanically stuck or failed (common)
3. Valve Driver PCB or Processor PCB is defective (occasional)
4. Valve compressor pneumatic pressure is low (occasional)

4 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

White valve detected out of position patient safety

White valve did not respond to command and remains in incorrect position

Ranked causes

1. Valve solenoid power or control signal is incorrect (common)
2. Valve is mechanically stuck or failed (common)
3. Valve Driver PCB or Processor PCB is defective (occasional)
4. Valve compressor pneumatic pressure is low (occasional)

4 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Yellow valve detected out of position patient safety

Yellow valve did not respond to command and remains in incorrect position

Ranked causes

1. Valve solenoid power or control signal is incorrect (common)
2. Valve is mechanically stuck or failed (common)
3. Valve Driver PCB or Processor PCB is defective (occasional)
4. Valve compressor pneumatic pressure is low (occasional)

4 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Air detected by blood line air detector patient safety

System displays error 331 when BLAD detects air in blood line

Ranked causes

1. Air in blood line (common)
2. Air detector electrical connection failure (occasional)
3. Processor PCB failure (rare)

First check

Run air detector diagnostic test

Test point: Diagnostics menu - Air Detector test
Expected: Test confirms air is detected when expected

1 more check with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Air removed from air detector patient safety

System displays error 340 when air detector detects fluid instead of air

Ranked causes

1. Fluid in air detector when air expected (common)
2. Air detector electrical connection issue (occasional)
3. Processor PCB fault (rare)

First check

Run air detector diagnostic

Test point: Diagnostics Air Detector test
Expected: Test confirms fluid detected when air expected

1 more check with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Date and time not set correctly

Machine clock shows incorrect date/time; affects data logging timestamp accuracy

Ranked causes

1. Machine relocated to different time zone (occasional)
2. Daylight Savings Time change occurred (occasional)
3. Initial machine calibration not performed (rare)

First check

Verify current date setting

Test point: Machine Parameters > Time of Day > Current Date
Expected: Today's date in MM-DD-YY format

2 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

ECV limit reached patient safety

System displays error 393 when maximum Extra Corporeal Volume limit reached; complete return cycle required

Ranked causes

1. Low hematocrit in donor blood (common)
2. Blood efficiency affected by flow restriction (common)
3. Blood pump rotor defect (common)

First check

Review donor hematocrit and blood parameters

Test point: Donor pre-procedure blood work
Expected: Hematocrit within acceptable range for procedure

2 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Expected fluid flow to weigher not detected

System displays error 379 when no change in bag weight detected during collection

Ranked causes

1. Weigher calibration or offset error (common)
2. Load cell assembly failure (offset > 200) (occasional)
3. Processor PCB failure (rare)

First check

Check weigher OFFSET and calibration value

Test point: Utilities - Weigher calibration menu
Expected: OFFSET less than 200, calibration within specification

1 more check with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Extra corporeal volume limit reached during draw cycle

ECV limit alarm displayed; operator must decide whether to continue Draw or start Return Cycle

Ranked causes

1. Donor blood hematocrit very low (common)
2. Blood flow restriction affecting efficiency (common)
3. Blood pump rotor malfunction (common)

First check

Measure blood pump flow efficiency

Test point: Blood pump outlet
Expected: Within ±10% of set volume

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

No flow from donor detected

System displays error 341 when pump speeds decelerate to zero due to low pressure measurement

Ranked causes

1. Low donor pressure or flow restriction (common)
2. DPM calibration error (occasional)
3. DPM assembly failure (occasional)

First check

Check donor tubing for occlusions or restrictions

Test point: Donor tubing
Expected: No clamps, kinks, or blockages visible

2 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Weigher bag weight changed unexpectedly (operation)

System displays error 387 when unexpected weight change occurs; do not touch weigher during operation

Ranked causes

1. External vibration or operator interference (common)
2. Weigher calibration or offset error (occasional)
3. Load cell assembly failure (occasional)

First check

Verify weigher is not disturbed during operation

Test point: Weigher platform
Expected: No external contacts, vibration stable

1 more check with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Weigher bag weight changed unexpectedly (TPE)

System displays error 386 when large weight change detected on weigher for TPE procedure

Ranked causes

1. Weigher calibration or offset error (common)
2. Load cell assembly failure (offset > 200) (occasional)
3. Processor PCB failure (rare)

First check

Check weigher OFFSET and calibration

Test point: Utilities - Weigher calibration menu
Expected: OFFSET less than 200, calibration within specification

1 more check with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

A/D converter test failed

Analog to digital converter does not read expected voltage levels (20%, 50%, or 80% of max)

Ranked causes

1. A/D converter circuit malfunction (unknown)
2. DPM or SPM transducer output out of range (unknown)

First check

Measure DPM and SPM signal levels at 20%, 50%, 80% of maximum

Test point: DPM and SPM signal outputs
Expected: Values must be within specified range for each test level

Air sensor test failed

System cannot detect air in sensor line; audible warning and error code displayed

Ranked causes

1. Air detector sensor malfunction (unknown)
2. Sensor line blockage or disconnection (unknown)

First check

Verify air detector sensor functionality

Test point: ACAD, BLAD, DLAD1, DLAD2 sensors
Expected: Each sensor must sense air; test line turned on to ensure air can be sensed

Calibration: Bowl Optics Signal (seven valve machine)

Adjust optics beam aiming and gain to achieve specified peak voltage reading on rim of aiming fixture

Ranked causes

1. Optics beam not peaked or offset/gain out of specification (unknown)
2. Offset voltage out of specification (unknown)

First check

Peak optics beam on rim of aiming fixture

Test point: Optics aiming fixture #ETE-5007 rim (nick-free section)
Expected: 2.500 +/- 0.5 volts V, +/- 0.5
Tools: Voltage Meter, Fluke 21 or equivalent, optics adjusting fixture #ETB-5266

4 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Power Supply high voltage

Verify DC output voltages are within specification on Advanced Personality PCB test points TP1–TP5 using ground reference TP6

Ranked causes

1. 5V supply out of specification (unknown)
2. Other supply voltages out of specification (unknown)

First check

Measure 5V output

Test point: TP pin 1
Expected: 5.1 +0.1/-0 VDC, +0.1/-0
Tools: Voltage Meter, Fluke 21 or equivalent

4 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Centrifuge cover switch test failed

Cover switch transition or relay not responding correctly during manual test

Ranked causes

1. Cover switch not transitioning or stuck (unknown)
2. Centrifuge relay not responding (unknown)

First check

Check initial cover switch state

Test point: Centrifuge cover switch
Expected: Switch state matches cover position (open or closed)

1 more check with pass and fail actions are in ServiceForge. Connect ServiceForge to your AI

Cuff transducer out of tolerance

Cuff pressure reading exceeds specification limits; may be installed during test startup

Ranked causes

1. Cuff connected during test (common)
2. Cuff transducer malfunction (rare)

First check

Verify cuff is disconnected from rear panel

Test point: Cuff connector
Expected: Cuff must be disconnected

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Disposable ID and protocol do not match patient safety

System displays error message when loaded disposable ID does not match selected protocol

Ranked causes

1. Wrong disposable loaded for selected protocol (common)
2. Disposable ID reader failure (occasional)

First check

Verify operator protocol selection

Test point: Display screen protocol indication
Expected: Protocol matches disposable being installed

5 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

DPM or SPM connector test failed

Analog verification fails; connector may be unseated or filter not properly removed

Ranked causes

1. DPM or SPM filter installed when test commenced (common)
2. DPM or SPM connector disconnected or unseated (unknown)

First check

Check DPM and SPM filters installed

Test point: DPM and SPM interlock sensors
Expected: Filters must not be installed

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

DPM or SPM out of tolerance

Transducer offset readings exceed ambient pressure limits when filters not installed

Ranked causes

1. DPM or SPM filter installed when test commenced (common)
2. DPM or SPM transducer failure or drift (unknown)

First check

Check DPM and SPM filters are not installed

Test point: DPM and SPM interlock
Expected: Filters must not be installed; interlock test passes

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Error message displayed during operation

System displays error code on screen; operator can press NO to mute alarm for up to 30 seconds or HELP for troubleshooting hints

Ranked causes

1. Main computer detected correctable situation (common)
2. Safety system detected unsafe condition (occasional)

First check

Identify source of error message

Test point: Screen display
Expected: Error code visible on display

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

High pressure at DPM detected patient safety

Donor pressure monitor reading exceeds acceptable limits; system safety response triggered

Ranked causes

1. Actual high pressure condition in donor line (common)
2. DPM transducer malfunction or false reading (occasional)

First check

Verify DPM pressure reading is within acceptable maximum limits

Test point: DPM transducer output
Expected: Pressure at or below maximum specified limit

Incomplete cycle waste bag full

System displays error 391 for TPE when waste bag is full during collection

Ranked causes

1. Waste bag full during TPE procedure (common)
2. Weigher calibration error (occasional)

First check

Verify waste bag is full and replace

Test point: Waste bag weight or visual inspection
Expected: Bag full and ready for disposal

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Line sensor voltage out of range

Sensor output voltage too low or too high; tubing may be installed or sensor needs cleaning

Ranked causes

1. Tubing installed during test (common)
2. Line sensor dirty or contaminated (occasional)

First check

Verify no tubing installed on line sensor

Test point: Line sensor input
Expected: Tubing must be removed for test

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Low pressure at DPM detected patient safety

Donor pressure monitor reading below acceptable limits; system safety response triggered

Ranked causes

1. Actual low pressure condition in donor line (common)
2. DPM transducer malfunction or false reading (occasional)

First check

Verify DPM pressure reading is within acceptable minimum limits

Test point: DPM transducer output
Expected: Pressure at or above minimum specified limit

Protocol card not detected

System displays message to insert protocol card; card insertion fails to be recognized

Ranked causes

1. Protocol card not inserted (common)
2. Protocol card CRC mismatch (occasional)

First check

Verify protocol card is inserted in socket

Test point: Protocol card socket
Expected: Card fully seated in socket with no gaps

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

ROM CRC test fails

Bar graph displayed during ROM test, audible warning sounds, system halts with error code

Ranked causes

1. Program chip CRC mismatch (rare)
2. NVRAM chip corrupted or replaced (occasional)

First check

Observe ROM CRC test progress bar and final result

Test point: System display screen
Expected: Bar graph completes; no error message; no audible warning

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Safety system test failed patient safety

Safety system cannot open relay or respond to simulated error conditions; pump control compromised

Ranked causes

1. Safety system board malfunction (unknown)
2. Safety relay stuck or not responding (unknown)

First check

Verify safety system can open relay under simulated error conditions

Test point: Safety system relay
Expected: Relay must open (power disconnected from both pumps) when error simulated

System fails power-on self-test

System emits continuous tone, random key lights displayed, POST diagnostic fails

Ranked causes

1. RAM stuck bit detected (common)
2. CPU functional failure (occasional)

First check

Listen for continuous tone during power-on

Test point: System speaker output
Expected: Single tone for 2 seconds or less if RAM test passes

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Valve transitioning test failed patient safety

Valve position feedback incorrect or current transition not detected; valve may be stuck

Ranked causes

1. Valve stuck or mechanical failure (unknown)
2. Current feedback circuit fault (unknown)

First check

Transition each valve (red, blue, yellow, green, white, orange, purple) and verify position feedback

Test point: Valve position feedback signal
Expected: Position feedback must match commanded state for each valve

1 more check with pass and fail actions are in ServiceForge. Connect ServiceForge to your AI

Watchdog test failed patient safety

Watchdog clock monitoring not responding to CPU halt; safety system synchronization lost

Ranked causes

1. CPU to safety system watchdog clock fault (unknown)
2. Safety system relay not responding to watchdog fault (unknown)

First check

Stop watchdog clock generated by CPU and verify safety system reaction

Test point: Watchdog clock and safety relay
Expected: Safety system must open relay and post fault in fault register when clock stopped

Weigher out of tolerance

Load cell or offset reading exceeds specification limits; weight may be on device

Ranked causes

1. Weight remaining on weigher during test (common)
2. Load cell malfunction or drift (rare)

First check

Verify weigher is unloaded

Test point: Weigher load cell
Expected: No weight on weigher; offset within ±125 digital units from standard

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

AC Pump Direction Wrong patient safety

AC pump is turning in the wrong direction.

Ranked causes

1. Direction sensor or drive error (unknown)

First check

Verify AC pump rotation direction

Test point: AC pump direction feedback
Expected: Correct direction per hardware sensor
Tools: System monitor

AC Pump Position Incorrect patient safety

AC pump is lagging or preceding desired position by 128 counts.

Ranked causes

1. Motor position tracking error (unknown)

First check

Verify AC pump position feedback via Advanced Motor Driver PCB

Test point: Advanced Motor Driver PCB
Expected: Within 128 counts of desired position
Tools: System monitor

AC Pump Too Fast patient safety

AC pump speed is beyond +/- 5 cc/min from programmed value during operation.

Ranked causes

1. Pump speed deviation (unknown)

First check

Verify AC pump speed against programmed value

Test point: AC pump
Expected: +/- 5 cc/min from programmed value, +/- 5
Tools: System monitor

AC Pump Too Slow patient safety

AC pump speed is beyond +/- 5 cc/min from programmed value during operation.

Ranked causes

1. Pump speed deviation (unknown)

First check

Verify AC pump speed against programmed value

Test point: AC pump
Expected: +/- 5 cc/min from programmed value, +/- 5
Tools: System monitor

AC/Blood Pump Ratio High patient safety

Anticoagulant/blood pump ratio is beyond +/- 2 from programmed value.

Ranked causes

1. Pump ratio deviation (unknown)

First check

Verify AC/Blood pump ratio against programmed value

Test point: AC and Blood pumps
Expected: +/- 2 from programmed value, +/- 2
Tools: System monitor

AC/Blood Pump Ratio Low patient safety

Anticoagulant/blood pump ratio is beyond +/- 2 from programmed value.

Ranked causes

1. Pump ratio deviation (unknown)

First check

Verify AC/Blood pump ratio against programmed value

Test point: AC and Blood pumps
Expected: +/- 2 from programmed value, +/- 2
Tools: System monitor

Bar code reader not scanning correctly

Bar code reader unable to read codes or display input value

Ranked causes

1. Bar code reader not correctly installed (common)

First check

View bar code reader input value

Test point: Bar Code Diagnostics menu
Expected: Input Value = XX.XX displayed

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Blood Pump Direction Wrong patient safety

Blood pump is turning in the wrong direction.

Ranked causes

1. Direction sensor or drive error (unknown)

First check

Verify blood pump rotation direction

Test point: Blood pump direction feedback
Expected: Correct direction per hardware sensor
Tools: System monitor

Blood Pump Position Incorrect patient safety

Blood pump is lagging or preceding desired position by 128 counts.

Ranked causes

1. Motor position tracking error (unknown)

First check

Verify blood pump position feedback via Advanced Motor Driver PCB

Test point: Advanced Motor Driver PCB
Expected: Within 128 counts of desired position
Tools: System monitor

Blood Pump Too Fast patient safety

Blood pump speed is beyond +/- 5 cc/min from programmed value during operation.

Ranked causes

1. Pump speed deviation (unknown)

First check

Verify blood pump speed against programmed value

Test point: Blood pump
Expected: +/- 5 cc/min from programmed value, +/- 5
Tools: System monitor

Blood Pump Too Slow patient safety

Blood pump speed is beyond +/- 5 cc/min from programmed value during operation.

Ranked causes

1. Pump speed deviation (unknown)

First check

Verify blood pump speed against programmed value

Test point: Blood pump
Expected: +/- 5 cc/min from programmed value, +/- 5
Tools: System monitor

Blue Valve Out of Position patient safety

Blue valve is out of position during operation.

Ranked causes

1. Valve position sensor or drive failure (unknown)

First check

Verify blue valve position feedback

Test point: Blue valve feedback
Expected: Correct open/closed state
Tools: System monitor

Calibration CRC test failed

Power-on self-test fails; system displays error and audible warning; operator prompted to check error

Ranked causes

1. Calibration parameters corrupted or incorrect CRC value (unknown)

First check

Verify calibration CRC computation

Test point: Calibration variables storage space
Expected: CRC values must match stored value in non-volatile memory

More symptoms

Calibration: A/D Cuff
Calibration: Bowl Optics Final (seven and eight valve machines)
Calibration: Data Card baud rate
Calibration: Data Card serial port 1 output voltage
Calibration: Functional Test
Calibration: Line Sensor
Centrifuge actual speed does not match defined speed setpoint
Centrifuge bowl not seating properly on spindle
Centrifuge cover does not latch or seal
Centrifuge does not maintain vacuum
Centrifuge Not Turning
Centrifuge Speed Too Fast
Centrifuge Speed Too Slow
Centrifuge Vacuum Not Detected
Centrifuge vacuum system obstructed
Channel 1 state test failed
Channel 1 time base test failed
Channel 2 state test failed
Channel 2 time base test failed
Configuration CRC test failed
Device Disposal
Display shows incorrect pixels or is blank
DPM Filter Disconnected
DPM interlock switches not functioning
DPM pressure sensor inaccurate
Drip monitor counts inaccurate at high speed
Drip monitor counts inaccurate at low speed
Error code 28 - Fluid detected in centrifuge
Error code 74 - Division by Zero
Error code 78 - Overflow Error
Error code 79 - Array Bounds Error
Error code 80 - Illegal Opcode
Green Valve Out of Position
Incomplete cycle no product collected
Infrared interface configuration incorrect
Infrared interface P1005 jumper not set
Keyboard key does not respond or LED does not light
Machine requires recovery after shutdown
Machine shutdown during procedure
Network diagnostics request number not displaying
Orange Valve Out of Position
Pinch valve does not open or close
Power supply output voltage out of specification
Protocol card does not match disposable
Protocol parameters reset
Purple Valve Out of Position
Red Valve Out of Position
Safety system fault detected
Safety system pressure out of specification
SPM Filter Disconnected
SPM interlock switches not functioning
SPM pressure sensor inaccurate
SW1 switch baud rate not set to 19200
SW2 switch configuration incorrect
System startup self-test in progress
Weigher reading inaccurate
White Pump Direction Wrong
White Pump Position Incorrect
White Pump Too Fast
White Pump Too Slow
White Valve Out of Position
Yellow Valve Out of Position

62 more symptoms with ranked causes and checks are in ServiceForge. Connect ServiceForge to your AI

Error codes

Code	Meaning	Trigger	Severity
`0`	Time Out Error	Software watchdog timing constraint exceeded	critical
`0`	A CPU error caused the MCS+ to reset.	Computer encountered an error during operation	critical
`100`	Centrifuge safety switch not operational	Safety switch failure detected	error
`101`	Return cycle taking too long	Bowl emptying time exceeds expected duration	warning
`102`	Air detected earlier than expected	Bowl emptying time shorter than expected	warning
`103`	Low AC flow detected by drip monitor	AC flow rate below threshold	warning
`104`	High AC flow detected by drip monitor	AC flow rate above threshold	warning
`105`	No AC flow detected by drip monitor	AC flow not detected	error
`106`	No cuff pressure detected	Cuff pressure measurement failure	error
`107`	No air plasma interface detected	Air plasma interface detection failure	error
`16`	CPU error caused system reset	System problem during operation	critical
`17`	CPU error caused system reset	System problem during operation	critical
`18`	CPU error caused system reset	System problem during operation	critical
`18`	Fatal Error	Computer execution flow error	critical
`19`	Stack Full Error	Program stack overflow detected	critical
`19`	CPU error caused system reset	System problem during operation	critical
`20`	Stack Empty Error	Program stack underflow detected	critical
`21`	CPU error caused system reset	System problem during operation	critical
`22`	CPU error caused system reset	System problem during operation	critical
`22`	Error Reading Queue	Queue read operation failed	error
`223`	Centrifuge cover is not locked	Centrifuge cover latch microswitches indicate open or unlocked cover at start or during draw cycle	error
`224`	Purple Valve Out of Position	Purple valve not in correct position during operation	warning
`225`	Orange Valve Out of Position	Orange valve not in correct position during operation	warning
`226`	Blue Valve Out of Position	Blue valve not in correct position during operation	warning
`227`	Yellow Valve Out of Position	Yellow valve not in correct position during operation	warning
`228`	White Valve Out of Position	White valve not in correct position during operation	warning
`229`	Green valve detected out of position	Green valve malfunction or disconnection during operation	error
`23`	CPU error caused system reset	System problem during operation	critical
`23`	No Queue Found	Expected queue structure not located in memory	error
`24`	Error Writing to Queue	Queue write operation failed	error
`24`	CPU error caused system reset	System problem during operation	critical
`25`	Centrifuge stalled	Centrifuge encoder signals indicate stall	error
`252`	System CPU error encountered	CPU error related to pressure failure causing MCS+ reset	critical
`254`	Red valve detected out of position	Red (Donor) valve malfunction or disconnection	error
`255`	DPM filter has been disconnected	DPM filter connection loss detected	error
`256`	SPM filter has been disconnected	SPM filter connection loss detected	error
`257`	High pressure error at DPM	DPM pressure exceeded upper limit	error
`258`	Low pressure error at DPM	DPM pressure below lower limit	error
`259`	SPM high pressure error	SPM pressure exceeded upper limit	error
`26`	Centrifuge running too fast	Spindle speed 300 RPM greater than set speed	warning
`260`	SPM low pressure error	SPM pressure below lower limit	error
`261`	Draw not allowed with full bowl	Cycle interrupted with full bowl; reseparation cannot be achieved	error
`262`	Protocol card door is open	Protocol door opened during operation	warning
`263`	Centrifuge cover now locked	Centrifuge cover locking mechanism engaged	info
`264`	Protocol card door is closed	Protocol card door closed after being opened	info
`265`	Pump manifold not installed	System detects white pump manifold is not snapped in place	error
`27`	Centrifuge vacuum not detected	Vacuum level less than 9±1 psi during operation	warning
`28`	Fluid detected in centrifuge	Fluid detected in centrifuge well	critical
`29`	CPU error related to optics system	CPU error related to optics system caused reset	critical
`30`	CPU error related to air sensor	CPU error related to air sensor caused reset	critical
`305`	Stop key pressed	Operator presses STOP key	info
`31`	Centrifuge running too slow	Centrifuge encoder signals indicate spindle speed 300 RPM less than set speed	warning
`32`	CPU error related to A/D time-out	CPU error during A/D conversion caused reset	critical
`32`	AD Time Out Error	Analog-to-digital converter timeout during conversion	error
`33`	Sig Queue Full Error	Signal queue buffer overflow	error
`33`	CPU error related to queue	CPU error in queue processing caused reset	critical
`331`	Air detected by blood line air detector (BLAD)	BLAD detects air in blood line	error
`34`	CPU error related to ACK	CPU error related to ACK signal caused reset	critical
`34`	Ack Error	Acknowledgment signal not received or invalid	error
`340`	Air removed from air detector	Air detector detects fluid when air expected	error
`341`	No flow from donor detected	Pump speed decelerates to zero due to low pressure	warning
`343`	No pressure change detected at DPM	DPM cannot detect venous pressure change	warning
`344`	No pressure change detected at SPM	SPM cannot detect system pressure change	warning
`345`	DPM pressure out of range	DPM pressure measurement exceeds limits	warning
`35`	CPU error related to weigher	CPU error related to weigher system caused reset	critical
`351`	Prime flow control problem	No flow due to high pressure or vacuum at DPM	warning
`36`	CPU error related to line red	CPU error related to line red condition caused reset	critical
`37`	Air detected by system monitor	DLAD1 or DLAD2 air detector detects air	error
`370`	Interlock failure SPM/DPM	Interlock failure detected between SPM and DPM	error
`372`	Card/disposable mismatch	Card does not match the disposable	error
`373`	No donor pressure change detected at DPM	DPM cannot detect donor venous pressure change	warning
`374`	No system pressure change detected at SPM	SPM cannot detect system pressure change	warning
`379`	Expected fluid flow to weigher not detected	No change in bag weight detected during collection	warning
`38`	CPU error related to ATOD converter	CPU error in ATOD converter caused reset	critical
`380`	Expected fluid flow from weigher not detected	No change in bag weight detected during outflow	warning
`386`	Weigher bag weight changed (TPE)	Large weight change detected on weigher for TPE	warning
`387`	Weigher bag weight changed unexpectedly	Unexpected weight change during operation	warning
`388`	Procedure recovery	Power off for short time	info
`389`	Return cycle not completed	Return cycle incomplete; bowl not empty or BLAD signals early	error
`39`	Centrifuge running too slow	Centrifuge encoder signals indicate spindle speed 300 RPM less than set speed	warning
`390`	Incomplete cycle no product collected	Cycle interrupted early with no platelets collected	warning
`391`	Incomplete cycle waste bag full	Waste bag full during TPE procedure	warning
`393`	ECV maximum limit reached	Maximum Extra Corporeal Volume limit reached	warning
`394`	Extra Corporeal Volume limit reached	ECV limit threshold crossed during draw cycle	warning
`40`	AC pump running too slow	AC pump encoder signals indicate pump moving slower than set speed	warning
`400`	CPU test failure	CPU opcodes or registers fail functional test during power-on POST	critical
`402`	ROM CRC test failure	CRC 16 checksum of program code does not match stored value in ROM chip	critical
`404`	Protocol card CRC failure	CRC checksum of protocol card contents does not match value in last two bytes of address space	error
`405`	Calibration CRC test failed	CRC mismatch between computed and stored calibration values during power-on self-test	error
`406`	Configuration CRC test failed	CRC mismatch between computed and stored configuration values during power-on self-test	error
`407`	Protocol card does not match disposable	Installed protocol card incompatible with loaded disposable during power-on test	error
`408`	ACAD sensor test failed	Air detector (ACAD) cannot sense air during self-test	error
`409`	BLAD sensor test failed	Air detector (BLAD) cannot sense air during self-test	error
`41`	Blood pump running too slow	Blood pump encoder signals indicate pump moving slower than set speed	warning
`410`	DLAD1 sensor test failed	Air detector (DLAD1) cannot sense air during self-test	error
`411`	DLAD2 sensor test failed	Air detector (DLAD2) cannot sense air during self-test	error
`413`	Purple Valve self-test has failed	Purple valve self-test fails during system startup or diagnostics	error
`414`	Orange Valve self-test has failed	Orange valve self-test fails during system startup or diagnostics	error
`415`	Red Valve self-test has failed	Red valve self-test fails during system startup or diagnostics	error
`416`	Blue Valve self-test has failed	Blue valve self-test fails during system startup or diagnostics	error
`417`	Yellow Valve self-test has failed	Yellow valve self-test fails during system startup or diagnostics	error
`418`	White Valve self-test has failed	White valve self-test fails during system startup or diagnostics	error
`419`	Green Valve self-test has failed	Green valve self-test fails during system startup or diagnostics	error
`42`	White pump running too slow	White pump encoder signals indicate pump moving slower than set speed	warning
`420`	A/D Converter 20% self-test has failed	A/D Converter 20% self-test fails during system diagnostics	error
`421`	A/D Converter 50% self-test has failed	A/D Converter 50% self-test fails during system diagnostics	error
`422`	A/D Converter 80% self-test has failed	A/D Converter 80% self-test fails during system diagnostics	error
`423`	DPM connector test failed	DPM filter installed when analog verification test commenced or connector disconnected	error
`423`	DPM and SPM filters cannot be installed during self-tests	DPM filter detected as installed during system self-test initialization	error
`424`	DPM and SPM filters cannot be installed during self-tests	SPM filter detected as installed during system self-test initialization	error
`424`	SPM connector test failed	SPM filter installed when analog verification test commenced or connector disconnected	error
`425`	DPM filter needs to be installed	DPM filter not detected by system during self-test	warning
`426`	SPM filter needs to be installed	SPM filter not detected by system during self-test	warning
`427`	MCS+ could not detect DPM removal during connector test	DPM connector test fails, system cannot detect DPM removal	error
`427`	DPM connector test failed (alternate)	DPM signal verification failed during analog voltage testing	error
`428`	SPM connector test failed (alternate)	SPM signal verification failed during analog voltage testing	error
`428`	MCS+ could not detect SPM removal during connector test	SPM connector test fails, system cannot detect SPM removal	error
`429`	DPM offset (ambient pressure) is out of acceptable range (2.32 to 2.68 VDC)	DPM self-test detects offset outside specification during startup	error
`430`	SPM offset (ambient pressure) is out of acceptable range (2.32 to 2.68 VDC)	SPM self-test detects offset outside specification during startup	error
`431`	Weigher signal is out of allowed range	Weigher signal out of tolerance; Error 466 occurs first; if unresolved after 60 sec, Error 431 displays	error
`432`	Cuff pressure is out of allowed range	Cuff pressure self-test detects pressure outside specification	error
`433`	Safety system failed self-test	Safety system cannot open relay or does not respond to simulated error conditions during power-on test	critical
`434`	Safety system self-test has failed	Safety system self-test fails during system diagnostics	critical
`435`	Line Sensor output is too low	Line Sensor output voltage below specification during self-test	error
`436`	Line Sensor output is too high	Line Sensor output voltage above specification during self-test	error
`438`	Watchdog self-test has failed	Watchdog self-test fails during system diagnostics	critical
`439`	Low pressure at DPM	DPM transducer reading indicates pressure below minimum acceptable limit during power-on test	error
`439`	DPM signal is out of allowed range at low pressure	DPM signal detected outside acceptable range during operation	error
`44`	AC pump running too fast	AC pump encoder signals indicate pump moving faster than set speed	warning
`441`	DPM signal is out of the allowed range	Self test problem: high pressure error at the DPM	error
`441`	High pressure at DPM	DPM transducer reading indicates pressure above maximum acceptable limit during power-on test	error
`443`	State Test on Channel 1 has failed	Self test problem: state test on channel 1 failed	error
`444`	State Test on Channel 2 has failed	Self test problem: state test on channel 2 failed	error
`447`	Time Base Test on Channel 1 has failed	Self test problem: time base test on channel 1 failed	error
`448`	Time Base Test on Channel 2 has failed	Self test problem: time base test on channel 2 failed	error
`449`	Safety System self-test has failed	Self test problem: safety system failed the self test	critical
`45`	Blood pump running too fast	Blood pump encoder signals indicate pump moving faster than set speed	warning
`452`	Safety System self-test has failed	Self test problem: safety system failed the self test	critical
`453`	Safety System self-test has failed	Self test problem: safety system failed the self test	critical
`46`	White pump running too fast	White pump encoder signals indicate pump moving faster than set speed	warning
`461`	Centrifuge vacuum system is obstructed	Vacuum switch indicates blockage between switch and centrifuge spindle during system start-up vacuum test	error
`462`	Disposable ID reader has failed the self-test	Self test problem: disposable ID reader failed self test	error
`466`	Remove weight from weigher	Weigher detects weight (±125 digital units above standard offset) at start of weigher self-test	warning
`466`	Measured offset is +125 digital units from programmed offset	Weight detected on weigher when should be empty	warning
`467`	Excessive cuff pressure measured	MCS+ measures excessive cuff pressure	error
`467`	Disconnect cuff from rear panel	Cuff transducer reading indicates cuff connected at start of cuff self-test	warning
`468`	Line sensor is dirty or tubing not removed	Self test problem: line sensor not clean or tubing not removed	warning
`469`	Open the centrifuge cover latch	Centrifuge cover initially closed when cover switch test begins	info
`469`	Centrifuge cover switch must be tested for safe operation	Self test: centrifuge cover latch open when should be closed	warning
`470`	Centrifuge cover switch must be tested for safe operation	Self test: centrifuge cover latch closed when should be open	warning
`470`	Close the centrifuge cover latch	Centrifuge cover initially open when cover switch test begins	info
`471`	Protocol parameters reset	Protocol parameter CRC mismatch detected during power-on self-test	warning
`472`	BIOS CRC failure detected	Computer detects failure of BIOS CRC	critical
`475`	Calibration revision is incompatible	Self test problem: calibration revision incompatible	warning
`476`	Configuration revision is incompatible	Self test problem: configuration revision incompatible	warning
`478`	Centrifuge relay test failed	Self test problem: centrifuge relay test failed	error
`48`	AC pump running in wrong direction	AC pump encoder signals indicate pump moving in wrong direction	error
`49`	Blood pump running in wrong direction	Blood pump encoder signals indicate pump moving in wrong direction	error
`5`	Air detected by BLAD sensor	Air detected during operation	error
`5`	The BLAD detects air in the system.	Air detected by the BLAD air detector	error
`50`	White pump running in wrong direction	White pump encoder signals indicate pump moving in wrong direction	error
`52`	AC pump position not correct	AC pump position 128 counts ahead or lagging from set position	warning
`53`	Blood pump position not correct	Blood pump position 128 counts ahead or lagging from set position	warning
`54`	White pump position not correct	White pump position 128 counts ahead or lagging from set position	warning
`56`	AC/Blood pump ratio incorrect	AC or Blood pump ratio error detected during operation	warning
`57`	AC/Blood pump ratio incorrect	Occlusion at AC or blood pump during operation	error
`58`	Red valve detected out of position	Valve position sensing failure or valve mechanism malfunction	error
`59`	AC/Blood pump ratio too low	Pump speed or efficiency loss, encoder or motor malfunction	error
`6`	Air detected by DLAD1 sensor	Air detected during operation	error
`60`	AC/Blood pump ratio too high	Pump overspeeding or encoder reading error	error
`61`	CPU error with ATOD failure	Analog-to-digital converter malfunction causing CPU reset	critical
`62`	Donor ECV limit reached	Extra Corporeal Volume reaches 690 ml threshold	warning
`63`	Safety system error with Time Base Safety Fault	Time base reference failure in safety processor	critical
`64`	Safety system watchdog error	Watchdog timer expiration indicating system hang	critical
`65`	DPM/SPM connector fault	Electrical connection or interlock failure on DPM or SPM module	critical
`66`	Pressure fault causing system reset	Pressure spike or anomalous pressure reading in system	warning
`67`	Air detector circuit failure	Air detector sensor malfunction or circuit fault	critical
`68`	Blood pump feedback to safety board fault	Blood pump feedback signal abnormality to safety processor	critical
`69`	Safety system ECV limit warning	Extra Corporeal Volume reaches 690 ml threshold	warning
`7`	Air detected by DLAD2 sensor	Air detected during operation	error
`70`	Safety system ratio fault with pump occlusion	AC or blood pump occlusion causing abnormal pump ratio	error
`71`	Pump motor failure	Pump motor mechanical binding or electrical fault	critical
`72`	Prime error causing system reset	Air in system or improper priming of disposable tubing	critical
`73`	Power interruption caused system reset	AC power loss	error
`74`	CPU error - division by zero	CPU division by zero fault	error
`75`	CPU error - single step	CPU single step interrupt	error
`76`	CPU error - NMI	Non-maskable interrupt	error
`77`	CPU error - breakpoint	Breakpoint interrupt during execution	error
`78`	CPU error - overflow	Arithmetic overflow condition	error
`79`	CPU error - array bounds	Array bounds violation	error
`80`	CPU error - invalid opcode	Invalid processor instruction	error
`81`	CPU error - escape	Escape instruction error	error
`82`	CPU error - timer	Timer interrupt fault	error
`83`	CPU error - DMA	Direct memory access fault	error
`84`	CPU error - Air ISR	Air detector interrupt service routine fault	error
`85`	CPU error - INT ISR	Interrupt service routine fault	error
`86`	CPU error - double fault	Nested exception during exception handling	critical
`87`	CPU error - coprocessor overrun	Coprocessor task overrun	error
`88`	CPU error - invalid TSS	Invalid task state segment	error
`89`	CPU error - segment	Segment table error	error
`90`	CPU error - stack fault	Stack underflow or overflow	error
`91`	CPU error - general protection fault	Memory protection violation	error
`92`	CPU error - page fault	Virtual memory page access error	error
`93`	CPU error - coprocessor overrun	Coprocessor task overrun	error
`94`	CPU error - unexpected INT	Unexpected interrupt	error

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ServiceForge knowledge base record. Field-unverified unless technicians confirmed it. A teaching summary of the record, not a service manual. Export 2026-10-14.