Infusion pumps · Plum A+ family

Hospira Plum A+ with MedNet: troubleshooting and error codes

The ServiceForge knowledge base holds 28 documented symptoms for the Hospira Plum A+ with MedNet, with 41 ranked causes, 39 diagnostic checks with test points and expected values, and 107 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

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 does not meet volume requirements during loudness test

Ranked causes

1. Defective CPU (occasional)
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

Unrestricted flow test failure patient safety

Pump does not pass unrestricted flow performance test; unable to deliver fluid without restriction

Ranked causes

1. Cassette not properly seated (common)
2. Defective cassette (occasional)
3. Defective or dirty valve pins (occasional)

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

Cassette alarm test failure patient safety

Cassette alarm test does not complete properly during performance verification test

Ranked causes

1. Cassette not properly seated (common)
2. Defective cassette (occasional)

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

Delivery accuracy not within specification patient safety

Total fluid delivered differs from programmed VTBI by more than ±1 mL

Ranked causes

1. Pump mechanism wear or cassette chamber fatigue (occasional)
2. Pump mechanism mechanical failure (rare)

First check

Program Line A at 200 mL/hr, VTBI 10 mL and start pumping

Test point: Line A
Expected: PUMPING message and LED flashing

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

Electrical safety test failure high voltage

Leakage current or chassis ground resistance exceeds specification

Ranked causes

1. Damaged or degraded power cord insulation (occasional)
2. Poor chassis ground connection (occasional)

First check

Measure enclosure leakage current (normal condition, ground intact)

Test point: Safety analyzer
Expected: Not to exceed 100 µA
Tools: Safety analyzer per specifications in Section 5.3.1

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

Ethernet connection not available

Green LED on CE module is not illuminated; Ethernet connectivity is not established

Ranked causes

1. Ethernet cable not properly inserted into RJ-45 connector (common)
2. CE module failure or connection issue (occasional)

First check

Verify shielded Ethernet cable is plugged into RJ-45 connector

Test point: RJ-45 connector on CE module
Expected: Cable fully and securely inserted

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 patient safety

Self-test does not complete successfully on startup; cassette or CPU issue detected

Ranked causes

1. Cassette not properly installed (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

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

Display test failure caution

Display assembly does not respond to or pass functional test during PVT

Ranked causes

1. Defective display assembly (common)

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

Distal air-in-line not detected patient safety

Test cassette with distal air in line does not trigger detection alarm

Ranked causes

1. Distal air-in-line detection sensor malfunction (unknown)

First check

Insert distal test cassette and start pumping

Test point: Line A
Expected: PUMPING message displayed, LED above Line A flashes

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

Distal occlusion not detected at set pressure patient safety

Occlusion alarm does not trigger at specified distal pressure limit

Ranked causes

1. Distal pressure sensor malfunction or miscalibration (unknown)

First check

Set distal pressure limit to 6 psi

Test point: Options/Pressure/Post Infusion Rate menu
Expected: Distal Pressure Limit set to 6 psi

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

Ethernet connectivity not established

Green LED on CE module is not illuminated when Ethernet cable is connected

Ranked causes

1. Shielded Ethernet cable not properly plugged into RJ-45 connector or cable malfunction (unknown)

First check

Verify shielded Ethernet cable is connected to RJ-45 connector

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

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

Ethernet connector cable tab binding caution

Ethernet cable connector with tabs cannot be easily removed from RJ-45 connector

Ranked causes

1. Cable connector designed with anti-tangling tabs (unknown)

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

Keypad lockout switch malfunction

Keypad does not lock when switch moved to ON position, or invalid key presses do not generate alert

Ranked causes

1. Keypad lockout switch not in ON position (common)

First check

Verify keypad lockout switch position

Test point: Back of infuser keypad lockout switch
Expected: UP (ON) position

2 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

Keypad verification or functional test failure caution

Keypad does not respond properly during verification or functional test

Ranked causes

1. Defective keypad (common)

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

Nurse call function not triggering

Nurse call jack does not generate short circuit when infusion completes

Ranked causes

1. Nurse call jack contact failure or wiring disconnection (unknown)

First check

Connect DMM to nurse call jack for resistance measurement

Test point: Nurse call jack on back of infuser
Expected: DMM set to measure resistance

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

Proximal air-in-line not detected patient safety

Test cassette with proximal air in line does not trigger detection alarm

Ranked causes

1. Proximal air-in-line detection sensor malfunction (unknown)

First check

Insert proximal test cassette and start pumping

Test point: Line A
Expected: PUMPING message displayed, LED above Line A flashes

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

Proximal occlusion not detected patient safety

Line A tubing clamped proximal to cassette but PROXOCCL A/AIR alarm does not sound

Ranked causes

1. Proximal occlusion detection sensor malfunction (unknown)

First check

Verify pumping starts with Line A at 400 mL/hr, VTBI 50 mL

Test point: Line A LED and status bar
Expected: LED above Line A flashes, PUMPING message displayed

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

Stop delivery, then turn off patient safety

Operator attempted to turn off infuser while a delivery is in progress.

Ranked causes

1. Operator error - incorrect shutdown sequence (common)

First check

Verify all infusion lines stopped

Test point: Infusion pump channels
Expected: All channels in stop state; no flow occurring

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

Warning: Charger Service caution

Battery charging circuit hardware problem detected; charging circuitry not behaving as expected.

Ranked causes

1. Battery charging circuit malfunction (common)

First check

Verify AC adapter connection

Test point: Power connector
Expected: Secure connection at charging port

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

Warning: Low Battery caution

Infuser battery is discharged with approximately 30 minutes of battery life remaining; warning message displayed on LCD screen.

Ranked causes

1. Battery depleted during operation (common)

First check

Verify AC power availability

Test point: Power outlet
Expected: AC power available and functional

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

Warning: Replace Battery caution

Battery voltage has dropped below depleted threshold while charge level is above low charge threshold, indicating battery service is needed.

Ranked causes

1. Battery has reached end of service life (common)

First check

Verify battery replacement procedure

Test point: Battery compartment
Expected: Old battery removed; new battery installed per section 7.2.4

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

Wireless connection not appearing on main delivery screen

Wireless Connection Available icon does not appear on the main delivery screen despite device being in wireless network environment

Ranked causes

1. Device not receiving wireless signal or network access point not recognized (unknown)

First check

Verify device is receiving wireless signal and network access point is recognized

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

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 main delivery screen; device is not receiving wireless signal

Ranked causes

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

First check

Verify Wireless Connection Available icon appears on main delivery screen

Test point: Main delivery screen display
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
`Charger Service Warning`	Battery charging hardware circuit malfunction detected; charger not functioning properly	Charging circuitry hardware detects abnormal behavior or failure condition	warning
`E160`	Line B VTBI complete	Programmed VTBI completed on line B	error
`E161`	Line A VTBI complete	Programmed VTBI completed on line A	error
`E180`	Distal occlusion detected during non-delivery	Peak distal occlusion, non-delivery	error
`E181`	Distal occlusion detected during non-delivery	Negative distal occlusion, non-delivery	error
`E182`	Proximal occlusion B detected during non-delivery	Negative proximal occlusion B, non-delivery	error
`E183`	Proximal occlusion B detected during non-delivery	Peak proximal occlusion B, non-delivery	error
`E184`	Proximal occlusion A detected during non-delivery	Negative proximal occlusion A, non-delivery	error
`E185`	Proximal occlusion A detected during non-delivery	Peak proximal occlusion A, non-delivery	error
`E186`	Distal occlusion detected during delivery	Peak distal occlusion, delivery	error
`E187`	Distal occlusion detected during delivery	Negative distal occlusion, delivery	error
`E188`	Proximal occlusion B detected during delivery	Negative proximal occlusion B, delivery	error
`E189`	Proximal occlusion B detected during delivery	Peak proximal occlusion B, delivery	error
`E190`	Proximal occlusion A detected during delivery	Negative proximal occlusion A, delivery	error
`E191`	Proximal occlusion A detected during delivery	Peak proximal occlusion A, delivery	error
`E230`	Proximal air-in-line total detected	500 microL of air has entered the cassette	error
`E231`	Proximal air-in-line on line B detected	500 microL of air has entered the cassette on line B	error
`E232`	Proximal air-in-line on line A detected	500 microL of air has entered the cassette on line A	error
`E233`	Distal air cumulative detected	500 microL of air detected in the last 5.3 mL of fluid delivered	error
`E234`	Distal air-in-line detected (older firmware version)	Air detected in distal line before 1 mL fluid delivered on older Plum A+ software versions	warning
`E250`	Door opened while pumping	Door opened while pumping	error
`E251`	Valve/cassette test failure	Valve/cassette fails the leak test	error
`E252`	Depleted battery	Battery terminal voltage is less than 5.45 V	error
`E253`	Lockout violation - hard lockout	The use of [STOP] key or attempt to open door while lockout switch is locked	error
`E254`	Lockout enabled - keypad locked	Any action not resulting in stopping delivery while lockout switch is locked	error
`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) is not at the expected range	error
`E320`	Battery charge/discharge current out of range	Current limiting circuitry in power supply board has failed or other hardware causing excessive current draw	critical
`E321`	Failure of charging current to drop below threshold	Charging current does not drop below end of charge threshold within 8 hours or below 1A within 6 hours	critical
`E322`	Battery current calibration value out of range	Battery charging current measurement is out of acceptable range	critical
`E323`	Battery trickle charge current out of range	Battery trickle charge current is out of acceptable range	critical
`E324`	Supply overvoltage	Power supply voltage exceeds safe operating range	critical
`E325`	Battery overvoltage	Battery voltage exceeds acceptable range	critical
`E326`	Battery disconnected or voltage too low	Connectors not seated on battery terminals or battery voltage critically low while infuser is on	critical
`E340`	Critical instruction failure	Power-up CPU register test failed	critical
`E341`	Critical data memory failure	Critical data memory failure detected	critical
`E342`	Display failure	Display assembly malfunction detected	critical
`E343`	Distal air sensor failure 1	With cassette removed, distal air sensor self test detects liquid	error
`E344`	Distal air sensor failure 2	With cassette inserted, distal air sensor self test detects sensor out of range	error
`E345`	Distal pressure sensor failure 1	Distal pressure sensor failed while infuser is off	error
`E346`	Distal pressure sensor failure 2	Distal pressure sensor failed while infuser is on	error
`E347`	Hardware watchdog failure	Hardware watchdog timer failure detected	critical
`E378`	I/O valve phase loss	Generic I/O valve failure detected	error
`E379`	L/S valve phase loss	Generic L/S valve failure detected	error
`E380`	Plunger motor phase loss	Generic plunger motor failure detected	error
`E430`	Proximal air sensor failure 1	Proximal air sensor ongoing test detects liquid with cassette removed	error
`E431`	Proximal air sensor failure 2	Proximal air sensor self test detects liquid with cassette removed	error
`E432`	Proximal pressure sensor 1	Proximal pressure sensor failed while infuser is off	error
`E433`	Proximal pressure sensor 2	Proximal pressure sensor failed while infuser is on	error
`E434`	RAM failure	RAM memory failure detected	critical
`E435`	RTC failure	Real-time clock failure detected	critical
`E436`	ROM failure	ROM checksum failure detected	critical
`E437`	Software failure	Generic software failure detected	critical
`E438`	Stack out-of-range failure	Stack pointer exceeds valid memory range	critical
`E439`	Stuck key	A key is sensed as pressed for over two minutes	error
`E440`	Power hold stuck	Power hold signal stuck in active state	critical
`E443`	LCD failure	LCD bias is out of acceptable range	error
`E444`	CPU timebase inaccurate	CPU timer 2 and RTC measured times disagree	error
`E445`	RTC memory failure	Real-time clock memory is corrupted	error
`E446`	CPU timer failure	CPU timer 1 and timer 2 measured times disagree	error
`E447`	Battery ADC reading failure	16 consecutive battery ADC readings are all zero or max value	error
`E448`	SEEP write failure	SEEP data write operation failed	critical
`E449`	SEEP calibration data corrupted	Calibration data block in SEEP is corrupted	critical
`E450`	MMIO port read/write failure	I/O port read or write operation failed	critical
`E451`	Inaccurate delivery	Over-delivery or under-delivery detected during operation	warning
`E452`	Software failure	Miscellaneous software failures not categorized elsewhere	critical
`E453`	Two SEEP CRC errors	NVRAM data block CRC validation failed twice	critical
`E454`	NVRAM over capacity	Software attempting to write into non-existent NVRAM space	critical
`E455`	Invalid device configuration	Incorrect flash memory detected on peripheral PWA	critical
`E456`	Invalid drug library	Drug library installation started but not completed successfully	error
`E457`	Drug library corrupted	CRC failure detected on drug library data	error
`Low Battery Warning`	Battery charge critically low with approximately 30 minutes remaining before power loss	Battery voltage drops to threshold indicating insufficient charge for extended operation	warning
`N100`	Unrecognizable cassette	Incorrect cassette type inserted	warning
`N101`	No action - operator idle during delivery parameters entry	No operator action and no delivery for two minutes during delivery parameters entry	warning
`N102`	Infuser idle 2 minutes	Infuser in reset or idle for over two minutes	warning
`N103`	NV RAM lost therapy data	Therapy data is lost	error
`N104`	Nurse callback B	Delivery line B has changed (if alarm is enabled)	info
`N105`	Nurse callback A	Delivery line A has changed (if alarm is enabled)	info
`N160`	Line B VTBI complete	Programmed VTBI completed on line B	info
`N161`	Line A VTBI complete	Programmed VTBI completed on line A	info
`N180`	Distal occlusion detected during non-delivery	Peak distal occlusion, non-delivery	warning
`N181`	Distal occlusion detected during non-delivery	Negative distal occlusion, non-delivery	warning
`N182`	Proximal occlusion B detected during non-delivery	Negative proximal occlusion B, non-delivery	warning
`N183`	Proximal occlusion B detected during non-delivery	Peak proximal occlusion B, non-delivery	warning
`N184`	Proximal occlusion A detected during non-delivery	Negative proximal occlusion A, non-delivery	warning
`N185`	Proximal occlusion A detected during non-delivery	Peak proximal occlusion A, non-delivery	warning
`N186`	Distal occlusion detected during delivery	Peak distal occlusion, delivery	warning
`N187`	Distal occlusion detected during delivery	Negative distal occlusion, delivery	warning
`N188`	Proximal occlusion B detected during delivery	Negative proximal occlusion B, delivery	warning
`N189`	Proximal occlusion B detected during delivery	Peak proximal occlusion B, delivery	warning
`N190`	Proximal occlusion A detected during delivery	Negative proximal occlusion A, delivery	warning
`N191`	Proximal occlusion A detected during delivery	Peak proximal occlusion A, delivery	warning
`N230`	Proximal air-in-line total detected	500 microL of air has entered the cassette	warning
`N231`	Proximal air-in-line on line B detected	500 microL of air has entered the cassette on line B	warning
`N232`	Proximal air-in-line detected with backpriming required	Air detected in proximal line before 1 mL fluid delivered during proximal air-in-line test	warning
`N233`	Distal air cumulative detected	500 microL of air detected in the last 5.3 mL of fluid delivered	warning
`N234`	Distal air-in-line detected	Air detected in distal line before 1 mL fluid delivered during distal air-in-line test	warning
`N250`	Door opened while pumping	Door opened while pumping	warning
`N251`	Valve/cassette test failure	Valve/cassette fails the leak test	warning
`N252`	Depleted battery	Battery terminal voltage is less than 5.45 V	warning
`N253`	Lockout violation - hard lockout	The use of [STOP] key or attempt to open door while lockout switch is locked	warning
`N254`	Lockout enabled - keypad locked	Any action not resulting in stopping delivery while lockout switch is locked	warning
`N255`	Lockout violation - soft lockout	The use of [STOP] key or attempt to open door while lockout switch is locked	warning
`N256`	Lockout enabled - soft lockout	Any action not resulting in stopping delivery while lockout switch is locked	warning
`Replace Battery Warning`	Battery service or replacement required; voltage below depletion threshold	Battery voltage drops below minimum serviceable voltage while charge level above low threshold	warning
`Stop Delivery First`	Shutdown blocked; infuser cannot power down during active delivery	Power off command received while infusion pump is actively delivering fluid to patient	critical

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

Community

0 fixes logged by technicians through their AI, with outcomes, for this model.

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