Waste management systems · Neptune family

Stryker Neptune 2: troubleshooting and error codes

The ServiceForge knowledge base holds 22 documented symptoms for the Stryker Neptune 2, with 27 ranked causes, 29 diagnostic checks with test points and expected values, and 3 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Rover not docking or releasing from docking station

Rover fails to engage with or disengage from the docking station during the docking control procedure.

Ranked causes

1. Magnet not activated at start of docking procedure (common)
2. Magnet not deactivated at end of docking procedure (common)
3. Couplings not in correct extended state during docking (occasional)
4. Couplings not retracted before release (occasional)

First check

Verify magnet activation status at start

Test point: DOCKING CONTROL menu Magnet option
Expected: On

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

Docker coupler extension/retraction malfunction patient safety

Stepper motor or hall sensors not operating properly; couplers do not extend or retract smoothly

Ranked causes

1. Hall sensors misaligned or failed (occasional)
2. Stepper motor binding or failed (occasional)

First check

Verify hall sensor operation during coupler extension and retraction

Test point: Docker couplers
Expected: Hall sensors detect coupler position changes without interruption

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

Docker couplers do not raise or lower smoothly

Stepper motor extends and retracts couplers with interruption; hall sensors may not operate properly

Ranked causes

1. Hall sensors not operating properly (unknown)
2. Stepper motor malfunction (unknown)

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

Almost full canister alert patient safety

Five medium beeps sound and fluid level display value flashes when canister is near full capacity

Ranked causes

1. Fluid volume level approaching full capacity (common)

First check

Monitor fluid level display during procedure

Test point: Fluid level display on control panel
Expected: Flashing value indicating near-full condition

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

Canister full alert patient safety

Continuous beeping and fluid level display flashes FULL when canister reaches full capacity and suction stops

Ranked causes

1. Fluid volume at full capacity (common)

First check

Confirm canister is full

Test point: Fluid level display
Expected: FULL displayed with continuous beeping

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

Couplings do not retract

Coupling mechanism fails to retract fully, preventing rover separation from docking station

Ranked causes

1. Couplings not set to retracting (common)

First check

Verify couplings setting in DOCKING CONTROL menu

Test point: DOCKING CONTROL menu, Couplings option
Expected: Retracting

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

Couplings fail to retract

Couplings remain in extended position, preventing rover removal from docking station

Ranked causes

1. Couplings not set to Retracting in docking control menu (common)

First check

Navigate to Couplings option in DOCKING CONTROL menu

Test point: Menu display
Expected: Couplings option highlighted

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

Diverter does not close properly

Diverter valve fails to close, affecting fluid management during undocking sequence

Ranked causes

1. Diverter not commanded to close (common)

First check

Set diverter to closed position

Test point: DOCKING CONTROL menu, Diverter option
Expected: Closed

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

Diverter valve stuck open or closed

Diverter does not respond to DOCKING CONTROL menu commands, fluid flow blocked or uncontrolled

Ranked causes

1. Diverter not cycled through menu sequence correctly (common)

First check

Set Diverter to Large position

Test point: DOCKING CONTROL menu Diverter option
Expected: Large

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

Fluid suction HEPA filter clogged

Reduced suction or fluid offload performance due to filter saturation

Ranked causes

1. Filter requires replacement per maintenance schedule (common)

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

Fresh water filter degraded

Fresh water filter requires replacement during maintenance procedures

Ranked causes

1. Fresh water filter saturated or contaminated (common)

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

High suction limit range alert

Three long beeps sound and control panel display flashes HIGH when suction limit setting is at or above 120 mm-Hg

Ranked causes

1. Suction limit setting selected at or above 120 mm-Hg (common)

First check

Verify suction limit setting on control panel

Test point: SUCTION LIMIT SETTING dial
Expected: At or above 120 mm-Hg

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

Inconsistent display during initial docking

Control panel display information may appear inconsistent and procedure may take longer than specified during first rover docking

Ranked causes

1. Initial docking procedure normal startup behavior (common)

First check

Monitor docking progress despite display inconsistencies

Test point: Control panel display and cycle status
Expected: Docking cycle completes even if display appears inconsistent

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

Insufficient 20-liter canister capacity for 4-liter transfer patient safety

Screen appears indicating rover requires shutdown and docking when 4-liter canister contents cannot fit in 20-liter canister

Ranked causes

1. 20-liter canister has insufficient capacity to receive 4-liter canister fluid (occasional)

First check

Verify 20-liter canister available capacity before EMPTY operation

Test point: Control panel display screen
Expected: Screen indicating rover requires docking

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

Maximum 4-liter canister transfer cycles exceeded patient safety

Operation limited to maximum of three EMPTY 4L CANISTER cycles between docking cycles; screen displays number of remaining PREFILL cycles

Ranked causes

1. Three EMPTY 4L CANISTER cycles already performed since last docking (occasional)

First check

Verify number of PREFILL remaining cycles displayed

Test point: Control panel display when EMPTY button pressed
Expected: PREFILL remaining value decrements from 3 to 0

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

Neptune 2 connected directly to chest tube postoperatively patient safety

Device connected directly to patient's chest tube after surgery, resulting in fatalities. This is improper and unsafe use of the system.

Ranked causes

1. Improper connection to chest tube instead of proper drainage setup (rare)

First check

Verify connection method before use

Test point: Device inlet connection
Expected: Connected to approved fluid collection container, not directly to patient drainage tubes

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

Neptune 2 connected to closed wound drain postoperatively patient safety

Device connected to patient's closed wound drain after surgery, resulting in serious patient injury. This is improper and unsafe use of the system.

Ranked causes

1. Improper connection to closed wound drain (rare)

First check

Verify connection method before use

Test point: Device inlet connection
Expected: Connected to approved fluid collection container, not directly to patient wound drains

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

Offload rate exceeds specification

Rover empties 8 liters of fluid in more than 60 seconds during dock control offload

Ranked causes

1. Offload pump impeller worn or damaged (common)

First check

Measure offload rate by filling unit with 8 liters water and timing emptying

Test point: Rover dock control
Expected: Time not exceeding 1 minute (60 seconds) for 8 liters, not exceeding 1 minute

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

Rover does not read fluid volume in large canister

The system fails to display or report fluid level in the large canister assembly after transducer reinstallation

Ranked causes

1. Fluid level transducer rod routed incorrectly through large canister opening (common)

First check

Verify transducer rod routing through correct opening

Test point: Small opening at bottom of large canister assembly
Expected: TRANSDUCER ROD passes through small opening only, not large compartmented side

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

Suction loss during 4-liter canister emptying patient safety

Suction will be lost in both canisters for at least 30 seconds after EMPTY 4L CANISTER button is pressed

Ranked causes

1. 4-liter canister emptying cycle in progress (common)

First check

Assess if immediate suction is required

Test point: Current procedure status
Expected: No critical suction requirement for next 30+ seconds

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

Water remaining in drain valve during disassembly caution

Small amount of water remains in the drain valve assembly after prefill has been emptied, requiring controlled lifting of canister assembly to allow proper drainage

Ranked causes

1. Design of drain valve assembly retains fluid after prefill emptying (common)

First check

Verify all bolts have been removed from small canister assembly

Test point: Small Canister Assembly (P/N 702-001-300)
Expected: All bolts removed

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

Water remains in drain valve during disassembly caution

Small amount of water in drain valve assembly after prefill emptied; fluid may spill if canister lifted quickly

Ranked causes

1. Residual water in drain valve assembly (common)

First check

Lift small canister assembly slowly

Test point: Small Canister Assembly (P/N 702-001-300)
Expected: Fluid drains into large canister assembly without spilling

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

Error codes

Code	Meaning	Trigger	Severity
`-----`	Volume value in transition or error occurred	Fluid volume display being updated or error state detected	info
`Error`	Serious error has occurred	Critical system malfunction detected	critical
`FULL`	Canister is full	Fluid level in canister reaches maximum capacity	warning

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.