Infusion pumps · CADD family

Smiths Medical CADD-Solis: troubleshooting and error codes

The ServiceForge knowledge base holds 35 documented symptoms for the Smiths Medical CADD-Solis, with 44 ranked causes, 58 diagnostic checks with test points and expected values, and 10 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

LCD backlight not visible

Display content cannot be seen; LED backlight is off or too dim

Ranked causes

1. Microprocessor has not enabled LCD (unknown)
2. Brightness setting too low (common)
3. LED backlight failed (occasional)

First check

Verify LCD is enabled by turning on pump display

Test point: Front panel controls
Expected: Display activates and shows content

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

Data loss from memory during power-off patient safety

Delivery and record keeping parameters may be lost if backup battery is discharged

Ranked causes

1. Backup battery discharged or defective (rare)
2. Insufficient charge time for completely discharged backup battery (occasional)

First check

Verify backup battery charge status

Test point: Battery backed RAM circuit
Expected: Minimum 10 months backup capacity

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

LCD display not visible

LCD panel cannot be read even though power is on

Ranked causes

1. LED backlight disabled to conserve power (common)
2. LCD drive circuitry disabled by microprocessor (occasional)

First check

Increase brightness setting

Test point: Display settings menu
Expected: Display becomes visible

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

LCD display not visible or dim

LCD display is dark or difficult to read; LED backlight dim or off

Ranked causes

1. LED backlight disabled by microprocessor to conserve battery (common)
2. LCD circuit power supply fault (rare)

First check

Check LCD brightness setting

Test point: Pump display menu
Expected: Brightness level at or above 50%

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

Low battery alarm activating unexpectedly patient safety

Pump emits beeps and displays low battery message despite adequate battery level; pump may shut down prematurely

Ranked causes

1. High internal resistance battery or battery type mismatch (common)
2. Battery voltage noise causing false low battery detection (occasional)

First check

Verify battery type installed

Test point: Battery compartment label or inserted batteries
Expected: Four AA alkaline batteries

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

Pump shuts down due to low operating voltage patient safety

Pump turns off; no operation possible

Ranked causes

1. Battery voltage dropped below minimum operating threshold (common)
2. Use of carbon-zinc batteries or other high internal resistance batteries (occasional)

First check

Verify battery type installed

Test point: Pump battery compartment
Expected: Four AA alkaline batteries (not carbon-zinc or other types)

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

Pump shuts down due to low voltage patient safety

Pump powers off unexpectedly; operation stops

Ranked causes

1. Operating voltage below minimum threshold (common)
2. Carbon-zinc or high-resistance batteries installed (occasional)

First check

Verify battery type installed

Test point: Battery compartment
Expected: Four AA alkaline batteries

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

Pump shuts down unexpectedly patient safety

Pump powers off due to insufficient operating voltage

Ranked causes

1. Operating voltage dropped below minimum threshold (common)
2. High internal resistance in battery (carbon-zinc or depleted battery) (occasional)

First check

Check battery type in use

Test point: Battery compartment
Expected: Four AA alkaline batteries or rechargeable pack

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

Audible alarm inoperative after power loss patient safety

Audible alarm does not sound when pump loses all power during RUN mode

Ranked causes

1. Capacitor backup discharged or failed; pump was not powered for minimum backup charge time (occasional)

First check

Verify alarm circuitry capacitor charge status

Test point: Pump power and alarm function
Expected: Audible alarm sounds for 2 minutes after power loss if pump powered for 2+ minutes

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

Audible alarm volume not functioning

Pump should sound alarm at three selectable volumes: low, medium, and high

Ranked causes

1. Audible alarm circuit malfunction (unknown)

First check

Verify low volume alarm

Test point: Audible alarm output
Expected: Audible alarm sound at low volume

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

Backup memory loss during extended off-time patient safety

Delivery and record keeping parameters lost when pump powered off

Ranked causes

1. Battery backup exhausted after more than 10 months with pump off (rare)

First check

Verify pump retains parameters after power down

Test point: Pump memory after 10+ months off
Expected: Delivery and record keeping parameters intact

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

Backup RAM losing settings after power loss patient safety

Pump delivery and record keeping parameters lost when pump powered off

Ranked causes

1. Backup battery fully discharged or failed (rare)

First check

Verify pump parameters retained after power cycle

Test point: Pump display and memory
Expected: Delivery parameters and records preserved after power off and on

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

Battery backup memory failure patient safety

Delivery and record keeping parameters lost after extended power loss

Ranked causes

1. Internal lithium-manganese dioxide backup battery discharged or failed (rare)

First check

Power cycle pump and verify stored parameters

Test point: Pump display menu
Expected: Delivery rate and parameters retained after power off

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

Battery compartment damaged or contains debris caution

Battery compartment shows cracks, breaks, corrosion, or contains foreign material; battery contacts damaged

Ranked causes

1. Physical damage, corrosion, or contamination of battery compartment (unknown)

First check

Visually inspect battery compartment

Test point: Battery compartment interior, contacts, housing
Expected: No damage, cracks, debris, or corrosion; battery contacts intact and clean

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

Battery depleted message and continuous beeping patient safety

Display shows battery depleted warning; pump emits continuous beep tone; pump may not operate

Ranked causes

1. Battery voltage too low for safe operation (common)

First check

Measure battery voltage

Test point: Battery pack terminal
Expected: Below 4.5 V nominal; depleted
Tools: DMM

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

Battery door does not fit snugly or is cracked caution

Battery door loose, does not close properly, cracked or broken; seal improperly positioned

Ranked causes

1. Battery door damage, misalignment, or seal degradation (unknown)

First check

Close and latch battery door

Test point: Battery door
Expected: Fits snugly in place, not cracked or broken, seal in proper position

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

Battery fallout alarm not activating

Opening battery door should trigger continuous two-tone alarm for minimum 2 minutes

Ranked causes

1. Battery fallout alarm malfunction (unknown)

First check

Verify pump has power

Test point: LED indicators
Expected: LED flashing periodically

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

Battery fallout alarm not functioning patient safety

Pump fails to sound continuous two-tone alarm when battery power is lost and AC adapter disconnected

Ranked causes

1. Battery fallout alarm circuit malfunction (unknown)

First check

Program continuous rate to 1.0 mL/hr

Test point: pump display
Expected: 1.0 mL/hr set

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

Cassette latch does not operate smoothly or cassette not firmly attached patient safety

Latch mechanism rough, stiff, or cassette loose; cassette does not seat firmly when latched

Ranked causes

1. Latch mechanism damage or wear; cassette seating issue (unknown)

First check

Attach medication cassette to pump

Test point: Cassette latch handle
Expected: Latch handle in upright position; smooth operation; status bar shows 'Reservoir Cassette Latched'

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

Cassette lock does not turn or engage patient safety

Lock does not turn smoothly clockwise; cassette cannot be secured in locked position

Ranked causes

1. Lock mechanism jamming, damage, or wear (unknown)

First check

Insert key into cassette lock and turn clockwise

Test point: Cassette lock
Expected: Key turns smoothly clockwise into locked position

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

Depleted battery condition

Battery depleted message appears on display; pump beeps continuously

Ranked causes

1. Battery fully depleted (common)

First check

Verify pump shuts down due to low voltage

Test point: Power supply circuit
Expected: Pump shuts off automatically to prevent data loss

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

Display brightness affecting battery life

Raising LCD brightness setting decreases pump battery life; low brightness conserves power

Ranked causes

1. LED backlight power consumption from brightness setting (common)

First check

Monitor battery discharge rate at current brightness setting

Test point: Battery voltage during operation
Expected: Slower discharge at lower brightness; faster at higher brightness

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

Downstream occlusion pressure not within range

Pump should detect high pressure condition and trigger alarm when tubing is clamped during PCA dose delivery

Ranked causes

1. Occlusion pressure sensor calibration drift (unknown)

First check

Prepare pump and cassette for occlusion test

Test point: Medication cassette and tubing
Expected: Cassette attached, locked, tubing primed with distilled water free of air bubbles, distal clamp closed

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

Downstream occlusion pressure out of range patient safety

Pump does not generate expected pressure or high pressure alarm does not sound when delivering PCA dose against clamped distal tubing

Ranked causes

1. Occlusion pressure sensor offset or gain calibration error (unknown)

First check

Turn pump on and attach medication cassette with distilled water

Test point: cassette connector
Expected: Cassette latched and locked

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

Keypad keys feel flat or lack tactile response

Keys do not have distinctive tactile feel when pressed; feel flat instead of responsive

Ranked causes

1. Keypad mechanical wear or damage (unknown)

First check

Press each key on keypad

Test point: All keypad keys
Expected: Distinctive tactile feel, keys not flat

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

LCD backlight flashing during motor operation

Backlight blinks or flashes when pump motor activates

Ranked causes

1. Normal motor operation flashing behavior (common)

First check

Measure backlight flash duration during motor operation

Test point: LCD backlight
Expected: Flash for 12 mS (milliseconds) per motor cycle

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

LED indicator not functioning

Amber LED should blink every 3 seconds in STOP mode; Green LED should blink every 3 seconds in RUN mode

Ranked causes

1. LED indicator circuit malfunction (unknown)

First check

Verify Amber LED in STOP mode

Test point: LED indicator
Expected: Blink approximately every 3 seconds

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

Low battery alarm activated

Pump displays low battery message and emits 3 beeps every 5 minutes; pump continues to operate but with reduced battery life warning

Ranked causes

1. Battery capacity between 25% and low threshold (common)

First check

Verify battery status display

Test point: Pump LCD display
Expected: Battery low message displayed with 3 beeps every 5 minutes

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

Low battery condition

Battery low message appears on display; 3 beeps every 5 minutes; LCD backlight flashes 12 mS during motor operation

Ranked causes

1. Battery state between 25% and low threshold (common)

First check

Verify battery state measurement

Test point: Power supply circuit
Expected: Between 25% and low threshold before depletion

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

Low battery message and 3 beeps every 5 minutes

Battery low warning appears on display; pump emits beep pattern every 5 minutes; pump continues to operate

Ranked causes

1. Transition to low battery condition; supply voltage below threshold (common)

First check

Measure battery voltage

Test point: Battery pack terminal or pump power input
Expected: Low battery threshold (typically 4.5–5.0 V nominal range); below full charge (6.0 V) but above depleted
Tools: DMM

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

Low battery warning at 25–100% battery state

No alarm, pump operates normally

Ranked causes

1. Battery level is adequate (common)

Pump does not power on or system fault appears on startup

No audible beeps on power up, system fault screen displays before home screen, or LCD shows error

Ranked causes

1. Electrical or mechanical fault in pump (unknown)

First check

Insert 4 AA batteries and press and hold ON/OFF key

Test point: LCD display and audio output
Expected: Six audible beeps occur; home screen displays without prior fault screen

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

System fault alarm displayed high voltage

Unrecoverable hardware or software fault detected. Amber indicator LED continuously illuminated with audible two-tone alarm.

Ranked causes

1. Hardware or software fault detected (unknown)

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

System fault appears on power-up

LCD displays system fault screen before home screen appears during power-up sequence

Ranked causes

1. Electrical or mechanical fault (unknown)

First check

Insert 4 AA batteries and press ON/OFF key; observe LCD during power-up

Test point: LCD display
Expected: No system fault screen; six audible beeps occur; pump displays home screen

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

Visible damage to pump housing, LCD, sensors, or connectors caution

Cracks, breaks, or damage visible on LCD, occlusion sensor seals, valves, expulsor, cassette hinge, latch handle, lock, sensors, keypad, lights, AC jack, remote dose jack, USB connector, air detector, or housings

Ranked causes

1. Physical damage from mishandling, drop, or wear (unknown)

First check

Visually inspect pump housing, LCD, and all seals

Test point: Entire pump exterior
Expected: No cracks, breaks, or visible damage; all seals intact

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

Error codes

Code	Meaning	Trigger	Severity
`Battery depleted`	Battery completely depleted; pump will shut down soon	Battery state reaches fully depleted threshold	critical
`Battery depleted`	Battery voltage is critically low; pump cannot continue safe operation	Battery voltage drops below depleted threshold after low battery condition	critical
`Depleted battery`	Battery voltage has dropped to critically low level	Battery state falls below operational threshold after low battery condition	critical
`Depleted battery`	Battery charge below minimum operating threshold	Battery voltage drops below depleted level during pump operation	critical
`Depleted battery warning`	Battery power is too low to operate the pump	Battery voltage drops below operational threshold	critical
`Low battery`	Battery capacity has fallen to low threshold	Battery state between 25% and low threshold	warning
`Low battery`	Battery power is low but pump remains operable	Battery state transitions below 25% capacity threshold	warning
`Low battery`	Battery power is depleted to 25% of full charge or below	Battery voltage drops to low battery threshold during pump operation	warning
`Pump shutdown due to low voltage`	Pump automatically powers off because operating voltage is too low	Operating voltage drops below minimum threshold required for safe pump operation	critical
`Shutdown due to low voltage`	Pump has shut down because operating voltage is insufficient	Supply voltage falls below minimum operating threshold during motor operation	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.