Infusion pumps · Plum A+ family

Hospira Plum A+: troubleshooting and error codes

The ServiceForge knowledge base holds 40 documented symptoms for the Hospira Plum A+, with 75 ranked causes, 66 diagnostic checks with test points and expected values, and 145 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Occlusion not detected patient safety

Proximal or distal occlusion test fails, system does not detect tubing blockage

Ranked causes

1. Cassette not properly primed (common)
2. Defective cassette (common)
3. Dirty sensor pin (occasional)
4. Defective APP PWA (occasional)

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

Proximal occlusion test failure patient safety

Proximal line occlusion detection does not function

Ranked causes

1. Closed proximal clamp (common)
2. Cassette priming issue (common)
3. Defective cassette or sensor (occasional)
4. Defective APP PWA (occasional)

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

Air in line not detected patient safety

Proximal or distal air-in-line test fails, system does not detect air bubbles in tubing

Ranked causes

1. Defective special cassette (common)
2. Dirty sensors (common)
3. Defective APP PWA (occasional)

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

Air-in-line detection failure patient safety

Proximal or distal air detection does not function

Ranked causes

1. Defective special cassette (common)
2. Dirty sensors (common)
3. Defective APP PWA (occasional)

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

Alarm loudness test fails

Alarm does not produce expected sound level during test

Ranked causes

1. Defective CPU (occasional)
2. Defective peripheral PWA (occasional)
3. Defective piezo alarm assembly (common)

First check

Run Alarm Loudness Test

Test point: Alarm sound output
Expected: Alarm produces required sound level

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

Alarm loudness test failure caution

Alarm audible output does not meet specification

Ranked causes

1. Defective CPU (common)
2. Defective peripheral PWA (occasional)
3. Defective piezo alarm (occasional)

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

Alarm not sounding patient safety

Alarm loudness test fails or alarm inaudible during operation

Ranked causes

1. Defective CPU PWA (common)
2. Defective peripheral PWA (occasional)
3. Defective piezo alarm assembly (occasional)

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

Delivery accuracy error patient safety

Delivery accuracy test fails, infusion rate or volume measurement inaccurate

Ranked causes

1. Cassette not properly primed (common)
2. Damaged or faulty cassette (common)
3. Defective mechanism assembly (occasional)

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

Delivery accuracy test failure patient safety

Infusion delivery rate does not meet specification

Ranked causes

1. Cassette priming issue (common)
2. Damaged or faulty cassette (common)
3. Defective mechanism (occasional)

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

Distal occlusion test failure patient safety

Distal line occlusion detection does not function

Ranked causes

1. Cassette priming issue (common)
2. Defective cassette or sensor (occasional)
3. Defective APP PWA (occasional)

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

Air-in-line detected patient safety

Air bubbles detected in delivery cassette by proximal or distal air sensors; alarm N230-N234 generated

Ranked causes

1. Proximal air accumulation (> 500 µL) (common)
2. Distal air bolus or cumulative air (≥ 100 µL) (occasional)

First check

Verify air volume in proximal chamber

Test point: Cassette proximal reservoir
Expected: Less than 500 µL air visible

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

Calibration: Nurse call function test

Verify nurse call circuit operates correctly. Set primary rate to 400 mL/hr with 1 mL dose limit, observe short circuit reading on DMM after DOSE END and KVO appear.

Ranked causes

1. Nurse call test procedure as part of service verification (common)
2. Nurse call function not used (bypass test) (occasional)

First check

Primary rate and dose limit configuration

Test point: Display
Expected: Rate 400 mL/hr, dose limit 1 mL

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

Cassette alarm test failure caution

Cassette alarm function does not operate during test

Ranked causes

1. Cassette seating issue (common)
2. Defective cassette (occasional)

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

Cassette test fails or CASSETTE TEST FAIL message displayed

LCD displays CASSETTE TEST FAIL flashing message and alarm sounds after inserting empty or primed cassette

Ranked causes

1. Empty cassette inserted for alarm test (common)
2. Cassette hardware or sensor malfunction (rare)

First check

Verify infuser is powered on before cassette insertion

Test point: LCD display and power indicator
Expected: Infuser on with DELIVERY screen or CCA selection screen displayed

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

Door open while pumping or cassette insertion failure patient safety

Door opened during delivery or cassette not properly inserted; alarm N250 or N251 generated

Ranked causes

1. Door physically open or cassette loose (common)
2. Cassette or valve leak test failure (occasional)

First check

Verify door is closed

Test point: Door sensor/latch
Expected: Door fully closed and latched

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

Ethernet connection not functioning

Green LED on CE module is not illuminated when Ethernet connection should be active.

Ranked causes

1. Ethernet cable not properly connected to RJ-45 connector (common)
2. Green LED on CE module not illuminated (unknown)

First check

Verify shielded Ethernet cable is connected to RJ-45 connector

Test point: RJ-45 Ethernet connector on CE module
Expected: Shielded Ethernet cable firmly inserted

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

Free flow test failure patient safety

Free flow detection does not function properly

Ranked causes

1. Cassette seating or defect (common)
2. Dirty or defective valve pins (occasional)

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

Minimal or no fluid flow during free flow test patient safety

Distal tubing shows no flow or excessive flow instead of minimal drops when cassette door open or closed

Ranked causes

1. Normal operation during free flow test (common)
2. Excessive free flow indicating improper cassette seating or valve malfunction (occasional)

First check

Prepare test setup with primed cassette and collection container

Test point: Cassette, tubing, collection container positioning
Expected: Primed cassette installed, distal tubing end minimum 36 inches below cassette in collection container

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

Occlusion detected during delivery or non-delivery patient safety

Proximal or distal occlusion alarm generated (N180-N191); delivery line blocked or kinked

Ranked causes

1. Distal occlusion (delivery line blocked) (common)
2. Proximal occlusion (cassette inlet blocked) (common)

First check

Inspect distal line for occlusion

Test point: IV line from cassette to patient
Expected: Line patent; no kinks, clamps or visible blockage

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

Power on failure or unexpected shutdown patient safety

Infuser does not power on or powers off unexpectedly; low battery warnings or depleted battery message displayed

Ranked causes

1. Battery discharged or depleted (common)
2. Battery charging circuit failure (occasional)

First check

Verify battery terminal voltage

Test point: Battery terminals
Expected: Voltage greater than 5.45 V, > specified

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

Self test fails patient safety

Device self test does not complete successfully

Ranked causes

1. Cassette not properly installed (common)
2. Defective CPU PWA (rare)

First check

Verify cassette installation

Test point: Cassette seating
Expected: Cassette fully seated in device

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

Self test failure

Device power-on self test fails or cannot complete

Ranked causes

1. Cassette not properly installed or seated (common)
2. Defective CPU PWA (occasional)

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

Unrestricted flow event patient safety

Infusion flows without control; regulator closer not properly seated or administration set clamp open

Ranked causes

1. Regulator closer not completely seated (common)
2. Administration set clamp not closed (common)

First check

Inspect regulator closer seating

Test point: Regulator closer position
Expected: Regulator closer completely seated

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

Calibration: Delivery accuracy verification patient safety

Verify infusion pump delivers correct volume at programmed rate. Test dual-line system with 200 mL/hr rate and 10 mL dose on each line, confirm final delivery is 20 mL ± 1 mL total and KVO/alarm sound at completion.

Ranked causes

1. Calibration procedure as part of maintenance and service tests (common)

First check

Cassette door inserted and NEW PATIENT confirmed

Test point: Display screen
Expected: NEW PATIENT? message appears, then NEW PATIENT confirmed with YES

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

Calibration: Electrical safety verification high voltage

Verify AC mains leakage current and ground resistance meet safety specifications. Test enclosure leakage (normal and open ground), earth leakage, and chassis ground resistance using a safety analyzer.

Ranked causes

1. Electrical safety test procedure required for service verification (common)

First check

Power cord and analyzer connection

Test point: AC mains inlet and ground test point
Expected: Power cord connected to safety analyzer, ground lead connected to rear ground screw

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

Display backlight or contrast not adjustable or illegible

LCD backlight does not illuminate, cannot be adjusted, or display contrast cannot be changed; screen not legible from 18 inches at eye level

Ranked causes

1. Backlight or display hardware malfunction (rare)

First check

Verify LCD backlight is on and display legible

Test point: LCD display at eye level
Expected: Backlight illuminated, display clearly legible from approximately 18 inches distance

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

Display test fails

Device display does not function during test

Ranked causes

1. Defective display assembly (common)

First check

Run Display Test

Test point: Display output
Expected: Display functions and shows output

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

Fluid shield tab bent or damaged patient safety

Visual inspection reveals fluid shield tab is bent or damaged, which may unseat regulator closer and cause unrestricted flow

Ranked causes

1. Fluid shield tab bent or damaged during removal or installation (occasional)

First check

Visually inspect fluid shield tab

Test point: Fluid shield tab visible from open corner of mechanism assembly
Expected: Tab is straight and not bent or damaged

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

Gasket tape installation on mechanism chassis caution

Installation of gasket tape to cover opening on mechanism chassis to protect Switch PWA from fluid ingress

Ranked causes

1. Missing or inadequate gasket tape coverage on mechanism chassis opening (occasional)

First check

Verify gasket tape presence and alignment

Test point: Mechanism chassis opening
Expected: Gasket tape installed and covering opening, secure and not protruding beyond chassis

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

Keypad functional test failure caution

Keypad does not respond correctly during testing

Ranked causes

1. Defective keypad (common)

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

Keypad not responding

Keypad verification or functional test fails, keys not responding to input

Ranked causes

1. Defective keypad (common)

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

Keypad or softkey function not responding or producing incorrect results patient safety

Keypad entries not registered, softkeys not functioning, START/STOP/programmed rates not executing, LED indicators not responding, or incorrect rate/VTBI values displayed

Ranked causes

1. Keypad or firmware malfunction preventing input or operation (occasional)

First check

Select line A and verify PROGRAM screen displays

Test point: LCD display, softkey A
Expected: PROGRAM screen displayed after pressing A softkey from DELIVERY screen

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

Keypad test fails

Keypad does not respond during functional test

Ranked causes

1. Defective keypad (common)

First check

Run Keypad Verification/Functional Test

Test point: Keypad response
Expected: Keypad responds to input

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

Lockout switch test failure caution

Cassette lockout mechanism does not function

Ranked causes

1. Defective peripheral PWA (common)

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

Self test fails or alarm condition during startup patient safety

LCD does not display SELF TEST screen or alarm condition recurs when power cycled

Ranked causes

1. Hardware or firmware malfunction preventing self test completion (unknown)

First check

Verify AC power connection and CHARGE indicator

Test point: CHARGE/LINE indicator LED
Expected: CHARGE illuminates and alarm tone sounds

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

Unit does not deliver fluid or displays error during priming patient safety

Pump fails to deliver fluid or shows malfunction when executing the delivery accuracy test sequence, including cassette insertion and programming.

Ranked causes

1. Pump mechanism malfunction or cassette issue (unknown)

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

Unrestricted flow (regulator closer disengaged) patient safety

No alarm generated; door opening with disengaged regulator closer may cause uncontrolled fluid delivery

Ranked causes

1. Regulator closer mechanism disengaged or not fully engaged (rare)

First check

Remove mechanism and inspect regulator closer

Test point: Regulator closer assembly
Expected: Regulator closer fully engaged and moving freely

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

Unrestricted flow risk patient safety

Regulator closer not properly seated, creates risk of uncontrolled fluid flow

Ranked causes

1. Regulator closer not properly seated (common)

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

VTBI complete (programmed volume infused) patient safety

Alarm N160 or N161 generated; infusion of programmed volume complete on line A or B

Ranked causes

1. VTBI (volume to be infused) reached (common)

First check

Verify programmed volume delivered

Test point: Volume counter on display
Expected: Volume infused equals VTBI setting

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

Wireless connection not available

Wireless Connection Available icon does not appear on the main delivery screen when device should be receiving a wireless signal.

Ranked causes

1. Wireless network access point not recognized or signal not being received (unknown)

First check

Verify Wireless Connection Available icon appears on main delivery screen

Test point: Main delivery screen
Expected: Wireless Connection Available icon is displayed

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

Error codes

Code	Meaning	Trigger	Severity
`DEPLETED BATTERY (Info)`	Battery completely discharged	Device turned on without being plugged in while battery is depleted	info
`E300`	ADC failure - analog to digital converter malfunction	ADC converter failure detected	critical
`E300`	ADC failure	Analog to digital converter failure	error
`E301`	Audio alarm failure	Piezo is off but sensed on or piezo is on but sensed off	error
`E302`	Backlight failure	Backlight CCFT tube not at expected range	error
`E320`	Battery charge/discharge current out of range	Current limiting circuitry malfunction or excessive current draw	error
`E321`	Charging current failure to drop within threshold	Charging current does not drop below end-of-charge threshold within 8 hours or below 1A within 6 hours	warning
`E321`	Battery not charging	Battery charging timed out or complete battery discharge has occurred	critical
`E322`	Battery current calibration value out of range	Charge current measurement circuitry failure	error
`E323`	Battery trickle charge current out of range	Trickle charge current outside specification	error
`E324`	Supply overvoltage - charging circuit fault	Charging circuit produces excessive voltage	critical
`E325`	Battery overvoltage	Battery voltage exceeds specification	error
`E326`	Battery disconnected while infuser on or voltage too low	Battery connection loss detected during operation or voltage below minimum	critical
`E327`	Brownout condition	Brownout condition detected	error
`E340`	Critical instruction failure - CPU register test failed	Power-up CPU register test failure	critical
`E341`	Critical data memory failure	Critical data memory checksum or access failure	critical
`E342`	Display failure - defective display	Display malfunction detected	error
`E343`	Distal air sensor failure 1 - detects liquid with cassette removed	Self-test detects liquid with cassette out	error
`E344`	Distal air sensor failure 2 - sensor out of range	Self-test with cassette inserted detects out-of-range	error
`E345`	Distal pressure sensor failure 1 - failed while off	Sensor failure detected during standby	error
`E346`	Distal pressure sensor failure 2 - failed while on	Sensor failure detected during operation	error
`E347`	Hardware watchdog failure	Hardware watchdog timer malfunction	critical
`E378`	I/O valve phase loss	I/O valve motor phase detection failure	error
`E379`	L/S valve phase loss	L/S valve motor phase detection failure	error
`E380`	Plunger motor phase loss - generic motor failure	Motor output loss detected	error
`E430`	Proximal air sensor failure 1 - detects liquid cassette removed	Ongoing test detects liquid with cassette out	error
`E431`	Proximal air sensor failure 2 - self test detects liquid	Self-test detects liquid with cassette removed	error
`E432`	Proximal pressure sensor failure 1 - failed while off	Sensor failure detected during standby	error
`E433`	Proximal pressure sensor failure 2 - failed while on	Sensor failure detected during operation	error
`E434`	RAM failure	RAM memory test failure	error
`E435`	RTC failure	Real-time clock malfunction	error
`E435`	RTC failure - real-time clock malfunction	Real-time clock circuit failure	error
`E436`	ROM failure	ROM checksum verification failure	error
`E437`	Software failure - generic software malfunction	Generic software fault detected	error
`E438`	Stack out-of-range failure	Software stack pointer overflow/underflow	critical
`E439`	Stuck key - key pressed for >2 minutes	Keypad stuck in pressed state for over 2 minutes	error
`E439`	Stuck key	Key sensed as pressed for over two minutes	warning
`E440`	Power hold stuck	Power hold signal remains asserted	critical
`E443`	LCD failure - LCD bias out of range	Display bias voltage out of specification	error
`E444`	CPU timebase inaccurate	CPU timer 2 and RTC measured times disagree	warning
`E445`	RTC memory failure	Real-time clock memory corruption detected	warning
`E446`	CPU timer failure	CPU timer 1 and timer 2 measured times disagree	error
`E447`	Battery ADC reading failure - consecutive zero/max readings	16 consecutive ADC readings all zero or maximum	error
`E448`	SEEP write failure	SEEP data write operation failed	error
`E449`	SEEP calibration data corrupted	Calibration data block checksum failure	error
`E450`	MMIO port read/write failure	Memory-mapped I/O port read/write error	error
`E451`	Inaccurate delivery	Over/under delivery detected during operation	error
`E452`	Software failure - miscellaneous software failures	Various software fault conditions	error
`E453`	Two SEEP CRC errors - NVRAM data corrupted	Multiple non-volatile RAM checksum failures	critical
`E454`	NVRAM over capacity - write to non-existent space	Software attempts to write beyond NVRAM limits	error
`E455`	Invalid device configuration	Incorrect flash memory on peripheral PWA	error
`E456`	Invalid drug library	Drug library install was started but not completed successfully	warning
`E457`	Drug library corrupted	CRC failure on drug library	error
`LOW BATTERY (Warning)`	Battery has reduced capacity	Reduced battery capacity detected; first or second occurrence	warning
`N100`	Unrecognizable cassette	Incorrect cassette type inserted	warning
`N100 (URC)`	Unrecognizable cassette	Incorrect cassette type inserted	error
`N101`	No Action Alarm	No operator action and no delivery for 2 minutes during parameter entry	warning
`N101 (NAA)`	No action - infuser idle	No operator action and no delivery for two minutes during parameter entry	warning
`N102`	Infuser Idle 2 Minutes	Infuser in reset or idle for over 2 minutes without start command	warning
`N102 (RL)`	Infuser idle over 2 minutes	Infuser in reset or idle state for over 2 minutes	warning
`N103`	NV RAM lost therapy data	Therapy data is lost	error
`N103 (SEEP CRC)`	NV RAM lost therapy data	Therapy data lost due to incomplete NVRAM write	error
`N104`	Nurse callback B	Delivery line B has changed (if alarm enabled)	warning
`N104 (NC2)`	Nurse callback B	Delivery line B changed while callback enabled	warning
`N105`	Nurse callback A	Delivery line A has changed (if alarm enabled)	warning
`N105 (NC1)`	Nurse callback A	Delivery line A changed while callback enabled	warning
`N160`	Line B VTBI complete	Programmed volume to be infused completed on line B	info
`N160/E160`	Line B VTBI complete	Programmed VTBI completed on line B	info
`N160/E160 (VTB2)`	Line B VTBI complete	Programmed VTBI completed on line B	info
`N161`	Line A VTBI complete	Programmed volume to be infused completed on line A	info
`N161/E161`	Line A VTBI complete	Programmed VTBI completed on line A	info
`N161/E161 (VTB1)`	Line A VTBI complete	Programmed VTBI completed on line A	info
`N180`	Distal Occlusion	Peak distal occlusion detected during non-delivery phase	warning
`N180/E180`	Distal occlusion, peak	Distal occlusion detected during non-delivery	error
`N180/E180 (OD1)`	Distal occlusion - peak, non-delivery	Peak distal occlusion detected during non-delivery	error
`N181/E181`	Distal occlusion, negative	Distal occlusion detected during non-delivery	error
`N181/E181 (OD1)`	Distal occlusion - negative, non-delivery	Negative distal occlusion detected during non-delivery	error
`N182/E182`	Proximal occlusion B, negative	Proximal occlusion detected on line B during non-delivery	error
`N182/E182 (OP2)`	Proximal occlusion B, air - negative, non-delivery	Negative proximal occlusion B detected during non-delivery	error
`N183`	Prox Occl B At Startup	Peak proximal occlusion B detected during non-delivery startup	warning
`N183/E183`	Proximal occlusion B, peak	Proximal occlusion detected on line B during non-delivery	error
`N183/E183 (OP2)`	Proximal occlusion B, air - peak, non-delivery	Peak proximal occlusion B detected during non-delivery	error
`N184`	Prox Occl A / Air	Negative proximal occlusion A detected during non-delivery	warning
`N184/E184`	Proximal occlusion A, negative	Proximal occlusion detected on line A during non-delivery	error
`N184/E184 (OP1)`	Proximal occlusion A, air - negative, non-delivery	Negative proximal occlusion A detected during non-delivery	error
`N185`	Prox Occl A At Startup	Peak proximal occlusion A detected at startup non-delivery	warning
`N185/E185`	Proximal occlusion A, peak	Proximal occlusion detected on line A during non-delivery	error
`N185/E185 (OP1)`	Proximal occlusion A, air - peak, non-delivery	Peak proximal occlusion A detected during non-delivery	error
`N186`	Distal Occlusion	Peak distal occlusion detected during delivery	error
`N186/E186`	Distal occlusion during delivery, peak	Distal occlusion detected during delivery	error
`N186/E186 (OD1)`	Distal occlusion - peak, delivery	Peak distal occlusion detected during delivery	error
`N187`	Neg Distal Occlusion	Negative distal occlusion during delivery	error
`N187/E187`	Distal occlusion during delivery, negative	Distal occlusion detected during delivery	error
`N187/E187 (OD1)`	Distal occlusion - negative, delivery	Negative distal occlusion detected during delivery	error
`N188`	Prox Occl B / Air	Negative proximal occlusion B during delivery	error
`N188/E188`	Proximal occlusion B during delivery, negative	Proximal occlusion detected during delivery on line B	error
`N188/E188 (OP2)`	Proximal occlusion B - negative, delivery	Negative proximal occlusion B detected during delivery	error
`N189`	Prox Occl B / Air	Peak proximal occlusion B during delivery	error
`N189/E189`	Proximal occlusion B during delivery, peak	Proximal occlusion detected during delivery on line B	error
`N189/E189 (OP2)`	Proximal occlusion B - peak, delivery	Peak proximal occlusion B detected during delivery	error
`N190`	Prox Occl A / Air	Negative proximal occlusion A during delivery	error
`N190/E190`	Proximal occlusion A during delivery, negative	Proximal occlusion detected during delivery on line A	error
`N190/E190 (OP1)`	Proximal occlusion A - negative, delivery	Negative proximal occlusion A detected during delivery	error
`N191`	Prox Occl A / Air	Peak proximal occlusion A during delivery	error
`N191/E191`	Proximal occlusion A during delivery, peak	Proximal occlusion detected during delivery on line A	error
`N191/E191 (OP1)`	Proximal occlusion A - peak, delivery	Peak proximal occlusion A detected during delivery	error
`N230`	Prox Air, Backprime	500 µL air accumulated in proximal line (combined both lines)	warning
`N230/E230`	Proximal air total	500 µL of air has entered the cassette	error
`N230/E230 (APT)`	Proximal air-in-line total	500 microliter of air entered cassette	error
`N231`	Prox Air B, Backprime	500 µL air accumulated in proximal line B	warning
`N231/E231`	Proximal air on line B	500 µL of air has entered the cassette on line B	error
`N231/E231 (APB)`	Proximal air on B, backprime	500 microliter of air entered cassette on line B	error
`N232`	Prox Air A, Backprime	500 µL air accumulated in proximal line A	warning
`N232/E232`	Proximal air on line A	500 µL of air has entered the cassette on line A	error
`N232/E232 (APA)`	Proximal air on A, backprime	500 microliter of air entered cassette on line A	error
`N233`	Distal Air	500 µL cumulative air detected in last 5.3 mL fluid delivered	warning
`N233/E233`	Distal air cumulative	500 µL of air detected in the last 5.3 mL of fluid delivered	error
`N233/E233 (ADC)`	Distal air cumulative	500 microliter air detected in last 5.3 mL delivered	error
`N234`	Distal Air	100 µL air bolus detected at distal sensor	warning
`N234/E234`	Distal air bolus	100 µL bolus of air detected at distal sensor	error
`N234/E234 (ADB)`	Distal air bolus	100 microliter bolus of air detected at distal sensor	error
`N250`	Door open while pumping	Door opened during active delivery	error
`N250/E250`	Door opened while pumping	Door opened while pumping	critical
`N250/E250 (DCO1)`	Door opened while pumping	Infuser door opened during active pumping	error
`N251`	Cassette Test Failure	Valve/cassette fails leak test	error
`N251/E251`	Valve/cassette test failure	Valve/cassette fails the leak test	error
`N251/E251 (CS1)`	Valve/cassette test failure	Valve/cassette fails leak test	error
`N252`	Depleted Battery	Low battery terminal voltage during operation	critical
`N252/E252`	Depleted battery	Battery terminal voltage is less than 5.45 V	error
`N252/E252 (BDP)`	Depleted battery	Battery terminal voltage less than 5.45 V	error
`N253`	Hard lockout Violation	Attempt to use [STOP] key or open door while hard lockout engaged	warning
`N253/E253`	Lockout violation, hard	Use of [STOP] key or attempt to open door while lockout switch is locked	warning
`N253/E253 (LOV)`	Lockout violation - hard	STOP key pressed or door open attempt while lockout active	unknown
`N254`	Hard Lockout Enabled	Keypad action taken while hard lockout switch locked	warning
`N254/E254`	Lockout enabled, keypad locked	Any action not resulting in stopping of delivery while lockout switch is locked	warning
`N254/E254 (FPL)`	Lockout enabled - keypad locked	Action not stopping delivery while lockout enabled	unknown
`N255`	Soft lockout Violation	Attempt to use [STOP] key or open door while soft lockout enabled	warning
`N255 (SLV)`	Soft lockout violation	STOP key pressed or door open attempt while soft lockout active	warning
`N256`	Soft lockout Enabled	Keypad action taken while soft lockout switch locked	warning
`N256 (SLE)`	Soft lockout enabled	Action not stopping delivery while soft lockout enabled	warning
`No Alarm`	Unrestricted flow	Regulator closer disengaged and door opens	unknown
`REPLACE BATTERY (Warning)`	Battery must be replaced immediately	Third and subsequent occurrences of reduced battery capacity	warning
`Warning: Charger Service`	Charger hardware problem	Battery charging circuit malfunction detected	unknown
`Warning: Low Battery`	Low battery warning	Battery discharged to approximately 30 minutes of operation remaining	warning
`Warning: Replace Battery`	Battery service needed	Battery voltage less than depleted threshold and charge above low threshold	warning

Likely causes and actions for each code are in ServiceForge. Connect ServiceForge to your AI

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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.