Washer disinfectors

Steris Amsco Reliance 444: troubleshooting and error codes

The ServiceForge knowledge base holds 43 documented symptoms for the Steris Amsco Reliance 444, with 141 ranked causes, 74 diagnostic checks with test points and expected values, and 13 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Load door did not open

Alarm tone sounds, display shows 'AL: LOAD DOOR DID NOT OPEN', printout shows alarm with timestamp. Power door units only. Load door did not open after DOOR OPEN touch pad was pressed.

Ranked causes

1. Door control cycle issue (common)
2. Conveyor module interference (occasional)
3. Building air supply closed (common)
4. Door obstruction present (occasional)
5. Air solenoid valve malfunction (occasional)
6. Micrometric flow control valve malfunction (occasional)
7. Proximity switch malfunction (occasional)
8. Door cylinder mechanical failure (rare)
9. Air pressure regulator malfunction (occasional)

First check

Retry door open control sequence

Test point: Door control circuit
Expected: Door opens when DOOR OPEN pressed

7 more checks with pass and fail actions, 9 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Alarm: TOO LONG IN DRAIN

Alarm sounds, display shows AL SUMP / TOO LONG IN DRAIN, sump takes too long to drain

Ranked causes

1. Obstruction in drain line (common)
2. Faulty water level sensor (occasional)
3. Defective drain valve (occasional)
4. Faulty water fill valve (occasional)
5. Faulty transfer valve (occasional)
6. Air pressure regulator malfunction (occasional)

First check

Inspect drain line for obstruction

Test point: Drain line path
Expected: Clear, no blockages or kinks

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

Insufficient or no water entering chamber during treatment

Chamber not filling with water or filling too slowly during cycle

Ranked causes

1. Supply valves not fully open (common)
2. Fill solenoid valve fails in closed position (occasional)
3. Water level sensor malfunctions (occasional)
4. Drain Solenoid valve remains open (occasional)
5. Water supply strainers clogged with dirt (occasional)
6. Voltage reaching fill solenoid too low (rare)

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

Loads come out dirty

Equipment disinfection incomplete, dirt remains on surgical instruments after wash cycle

Ranked causes

1. Detergent supply is empty (common)
2. Incorrect detergent being used (common)
3. Rotary spray arms clogged (common)
4. Pump rotating in wrong direction (occasional)
5. Detergent pump not operating properly (occasional)
6. Detergent Low Level switch not operating correctly (occasional)

First check

Verify detergent supply level

Test point: Detergent container
Expected: Supply present and not empty

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

Water leaks from washer/disinfector caution

Water escaping from unit housing or connections

Ranked causes

1. Basket not positioned directly over rotary spray hub (common)
2. Riser valve worn (occasional)
3. Water level sensor malfunctions (occasional)
4. Too much water entering chamber during treatment (occasional)
5. Piping is leaking (occasional)
6. Pure water tank overflows (if option installed) (rare)

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

Alarm: TOO LONG IN FILL

Alarm sounds, display shows AL SUMP / TOO LONG IN FILL, chamber takes too long to fill with water

Ranked causes

1. Insufficient water supply pressure (common)
2. Water supply line shut-off valve closed (common)
3. Faulty water level sensor (occasional)
4. Faulty drain valve (occasional)
5. Faulty water fill valve (occasional)

First check

Verify water supply pressure

Test point: Water inlet connection
Expected: Pressure meets Equipment Drawings specification

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

Chamber does not drain completely

Water remains in chamber after drain cycle completes

Ranked causes

1. Chamber bottom filters clogged (common)
2. Defective drain valve (occasional)
3. Building piping obstructed (occasional)
4. Drain line plugged (occasional)
5. Voltage reaching drain valve too low (rare)

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

Insufficient or no water entering chamber through spray arms

Spray arms not receiving water flow during operation

Ranked causes

1. Basket not positioned directly over rotary spray hub (common)
2. Rotary spray arms clogged (common)
3. Bottom filters clogged (common)
4. Drain Valve is leaking (occasional)
5. Pump rotation incorrect (occasional)

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

Pump does not start during treatment

Wash pump fails to activate when cycle is running

Ranked causes

1. Faulty overload relay on pump starter (occasional)
2. Chamber water level sensor malfunctions (occasional)
3. Water not entering chamber (common)
4. Chamber door left open (common)
5. Open fuse on connector PC Board (rare)

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

Pure water tank too long to fill

Alarm tone sounds, display shows 'ALAR: PURE H20 TAN TOO LONG IN FILL', printout shows alarm with timestamp. Tank has taken too long to fill with water; fault may be due to insufficient water supply or water level sensor malfunction.

Ranked causes

1. Insufficient water supply pressure (common)
2. Pure water supply line shut-off valve closed (common)
3. Pure water tank level sensor malfunction (occasional)
4. Pure water outlet valve malfunction (occasional)
5. Pure water fill valve malfunction (occasional)

First check

Verify water supply line pressure

Test point: Water supply line
Expected: Per Equipment Drawings requirements

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

Display blank with no touch pad acknowledgment

Display is dark/inactive; touch pads do not respond when pressed

Ranked causes

1. Unit electrical disconnect switch in OFF position (common)
2. Control Power rocker switch in OFF position (common)
3. Fuse open (common)
4. Overtemperature switch for Drying function tripped (occasional)

First check

Verify unit electrical disconnect switch position

Test point: Main disconnect switch
Expected: Positioned to ON

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

Display shows PRINTER TIME OUT

Printer timeout error, printer fails to print within three-second window per line

Ranked causes

1. Paper jammed in printer (common)
2. Drag on paper roll (occasional)
3. Defective printer (occasional)
4. Printer PC board defective (occasional)

First check

Check for paper jam

Test point: Printer paper path
Expected: No jams or obstructions

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

Display shows SERVICE TEST at power-on

Eagle 3000 control stage displays SERVICE TEST message when unit powered on

Ranked causes

1. Unit in Service Mode (common)
2. Wiring issue between switch and control board (occasional)
3. Control board burn-in required (rare)
4. Control board defective (rare)

First check

Verify Service Mode status

Test point: Display
Expected: Not showing SERVICE TEST (normal operation mode)

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

Interior light does not turn on

Light fails to illuminate when unit is powered

Ranked causes

1. Printer Power OFF/STANDBY Rocker Switch in OFF/STANDBY position (common)
2. Unit still in Service Mode (occasional)
3. Interior Light Bulb burned out (occasional)
4. Open fuse on connector PC board (rare)

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

Parts of characters on printout missing

Printed output contains incomplete or partial characters

Ranked causes

1. Wrong thermal paper type used (common)
2. Printer head dirty (common)
3. Printer defective (occasional)
4. Printer PC board defective (occasional)

First check

Verify thermal paper type

Test point: Printer paper supply
Expected: STERIS supplied thermal paper only

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

Printer will not operate

Display normal at power-on but printer does not function

Ranked causes

1. Printer disabled (common)
2. Printer ribbon cable unplugged (occasional)
3. Printer PC board defective (occasional)
4. Printer defective (occasional)

First check

Verify printer is enabled

Test point: Printer settings in menu
Expected: Printer enabled

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

Pure water tank failed to reach temperature

Alarm tone sounds, display shows 'AL: PURE H20 TAN FAILED TO REACH TEMP.', printout shows alarm with timestamp. Pure water temperature is dropping below pre-set level.

Ranked causes

1. Steam supply line pressure insufficient (common)
2. Steam supply line shut-off valve closed (common)
3. Steam inlet valve malfunction (occasional)
4. Steam trap obstruction (occasional)

First check

Verify steam supply line pressure

Test point: Steam supply line
Expected: Per Equipment Drawings requirements

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

Sump failed to reach set temperature

Alarm tone sounds, display shows 'ALARM: SUMP FAILED TO REACH SET TEMP.', printout displays alarm with timestamp and message. Water temperature in sump is dropping below pre-set level.

Ranked causes

1. Steam supply line shut-off valve closed (common)
2. Steam supply line pressure insufficient (common)
3. Steam inlet valve malfunction (occasional)
4. Steam trap obstruction (occasional)

First check

Verify steam supply shut-off valve position

Test point: Steam supply line shut-off valve
Expected: Open

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

Conveyor did not move basket forward

Conveyor module equipped units, basket not advancing during operation

Ranked causes

1. Power switch in OFF/STANDBY position (common)
2. Conveyor operation bypassed (occasional)
3. Previous cycle was aborted (occasional)

First check

Verify power switch position

Test point: Power Switch
Expected: Positioned to POWER (not OFF/STANDBY)

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

Cycle does not start when CYCLE START touch pad pressed

Pressing CYCLE START button does not initiate the wash cycle

Ranked causes

1. Door left open (common)
2. EMERGENCY STOP button depressed (conveyor equipped units) (occasional)
3. Thermal overload protectors on starters tripped (occasional)

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

Display locks up showing RELIANCE MODEL 444

System displays model identifier and becomes unresponsive

Ranked causes

1. Printer unplugged (common)
2. Printer defective (occasional)
3. Printer PC board defective (occasional)

First check

Verify printer connection

Test point: Printer power and signal connectors
Expected: Connected and powered

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

Drying temperature too high caution

Alarm tone sounds, display shows 'AL: DRYING TEMP. TOO HIGH', printout shows alarm with timestamp. Drying RTD is detecting out-of-range temperature above preset.

Ranked causes

1. Dryer blower malfunction (common)
2. Heater element malfunction (occasional)
3. RTD connector unplugged or wiring defect (occasional)

First check

Test dryer blower operation

Test point: Dryer blower
Expected: Operates properly, blows air
Tools: Service Mode (Section 7.2.1)

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

Printer printout light or blank

Printed output is faint, illegible, or completely blank

Ranked causes

1. Printer paper loaded backwards (common)
2. Printer head dirty (common)
3. Printer defective (occasional)

First check

Verify paper loading orientation

Test point: Printer paper path
Expected: Paper loaded correctly per Section 4.4.4

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

Sump RTD defective

Alarm tone sounds, display shows 'AL: SUMP RTD DEFECTIVE', printout shows alarm with timestamp. Sump RTD is detecting out-of-range temperatures.

Ranked causes

1. RTD connector unplugged or loose (common)
2. RTD wiring open/short circuit (occasional)
3. Steam inlet valve malfunction (occasional)

First check

Verify RTD connector is seated

Test point: Sump RTD connector
Expected: Fully inserted and secure

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

Too much water entering chamber during treatment caution

Chamber overflowing or drain backing up with water during cycle

Ranked causes

1. Water level sensor fails to detect high water level (common)
2. Fill solenoid valve remains open (occasional)
3. Output valve leaks (pure water tank option only) (rare)

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

Touch pads produce no audible signal

Touch pads do not beep when pressed, no audio feedback from panel controls

Ranked causes

1. Touch panel unplugged (common)
2. Bad touch panel (occasional)
3. Alarm speaker unplugged or defective (occasional)

First check

Verify touch panel connection

Test point: Touch panel plug
Expected: Plugged in and seated

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

Detergent container empty

Alarm tone sounds, display shows 'ALA: PUMP NAM DETERGENT EMPTY', printout shows alarm with timestamp. Detergent container is empty or low level sensor is out of container.

Ranked causes

1. Detergent container empty (common)
2. Low level sensor out of container (occasional)

First check

Verify detergent container full

Test point: Detergent container level
Expected: Container full of detergent

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

Display has random characters

Display shows random or garbled text; printer operates but produces blank or random character printout

Ranked causes

1. Memory must be cleared (common)
2. Control board or RAM chip defective (occasional)

First check

Clear memory and load defaults

Test point: Control system memory
Expected: Default settings loaded successfully

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

Display is dark, no power to control high voltage

Display shows no power and control is unresponsive

Ranked causes

1. Thermal overload on drying heater tripped (common)
2. Three phase wiring incorrect or dryer blower running backwards (occasional)

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

Drying RTD defective

Alarm tone sounds, display shows 'AL: DRYING RTD DEFECTIVE', printout shows alarm with timestamp. Drying RTD is detecting out-of-range temperatures.

Ranked causes

1. RTD connector unplugged or loose (common)
2. RTD wiring open/short circuit (occasional)

First check

Verify RTD connector is seated

Test point: Drying RTD connector
Expected: Fully inserted and secure

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

Foam in chamber caution

Excessive foam or bubbles present during cycle operation

Ranked causes

1. Detergent foaming or incorrect type used (common)
2. Too much detergent injected during treatment (common)

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

Load door opened during process

Alarm tone sounds, display shows 'AL: LOAD DOOR OPEN DURING PROCESS', printout shows alarm with timestamp. Load door has been opened during processing.

Ranked causes

1. Load door opened during cycle (common)
2. Proximity switch disconnected or defective (occasional)

First check

Verify load door is fully closed

Test point: Load door
Expected: Door closed and latched

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

Paper will not be taken up into power takeup

Printer paper fails to advance through power takeup mechanism

Ranked causes

1. Motor or roller defective (common)
2. Insufficient voltage from PC Board (occasional)

First check

Verify voltage output from PC Board to takeup motor

Test point: Motor power supply
Expected: Voltage per Equipment Drawings

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

Printer printout erratic

Printer output inconsistent or unreliable

Ranked causes

1. Printer PC board defective (occasional)
2. Printer defective (occasional)

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

Pure water tank RTD defective

Alarm tone sounds, display shows 'AL: PW TANK RTD DEFECTIVE', printout shows alarm with timestamp. Pure water tank RTD is detecting out-of-range temperatures.

Ranked causes

1. RTD connector unplugged or loose (common)
2. RTD wiring open/short circuit (occasional)

First check

Verify RTD connector is seated

Test point: Pure water tank RTD connector
Expected: Fully inserted and secure

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

Pure water tank temperature too high caution

Alarm tone sounds, display shows 'ALRM: PURE H2 a TEMP. TOO HIGH', printout shows alarm with timestamp. Pure water tank RTD is detecting out-of-range temperature above preset.

Ranked causes

1. RTD connector unplugged or wiring defect (common)
2. Steam inlet valve or heating element malfunction (occasional)

First check

Verify RTD connector is seated and wiring intact

Test point: Pure water tank RTD connector and wiring
Expected: Fully inserted, no damage

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

Alarm: MAINTENANCE DUE

Display shows MAINTENANCE DUE! CALL SERVICE, cycle or service count interval expired

Ranked causes

1. Cycle count and/or Service Count time delay expired (common)

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

Alarm: STOP WAS PRESSED

Alarm sounds, display shows STOP WAS PRESSED / PRESS START TO RESUM, printout shows CYCLE STOPPED

Ranked causes

1. STOP touch pad was pressed (common)

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

Control powers up with default values

System loses stored configuration and reverts to factory defaults on power-on

Ranked causes

1. RAM battery is dead (common)

First check

Verify RAM battery status

Test point: RAM chip power supply
Expected: Battery voltage adequate to retain memory

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

Door hard to open or will not close

Manual door units only. Load or unload door is difficult to operate or stuck

Ranked causes

1. Door cable broken (common)

First check

Inspect door cable for damage

Test point: Door cable
Expected: Cable intact, not broken or frayed

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

Motor overloads tripped caution

Alarm tone sounds, display shows 'ALA: MOTOR OVERLOADS TRIPPED...', printout shows alarm with timestamp. Pump or dryer contactor overload has tripped.

Ranked causes

1. Overload relay activation (common)

First check

Reset motor overload relay

Test point: Contactor box overload reset
Expected: Overload reset and cleared

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

Pump starts before appropriate chamber water level reached

Pump begins operation prematurely before chamber fills to proper level

Ranked causes

1. Chamber water level sensor malfunctions (common)

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

Sump water temperature too high caution

Alarm tone sounds, display shows 'AL: SUMP WATER TEMP. TOO HIGH', printout shows alarm with timestamp. Sump RTD is detecting out-of-range temperature above preset.

Ranked causes

1. Steam inlet valve stuck open or leaking (common)

First check

Test steam inlet valve operation

Test point: Steam inlet valve
Expected: Operates properly, closes when de-energized
Tools: Service Mode (Section 7.2.1)

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

Error codes

Code	Meaning	Trigger	Severity
`ALA: MOTOR OVERLOADS TRIPPED...`	Pump or dryer contactor overload relay has tripped	Motor current exceeds overload setpoint	error
`ALA: PUMP NAM DETERGENT EMPTY`	Detergent container is empty or low level sensor is out of container	Low level sensor signal absent during wash cycle	warning
`ALARM: SUMP FAILED TO REACH SET TEMP.`	Water temperature in sump (heated) is dropping below pre-set level	Sump temperature fails to reach or maintain setpoint	error
`AL: DRYING RTD DEFECTIVE`	Drying RTD is detecting out-of-range temperatures	RTD sensor reads outside acceptable range	error
`AL: DRYING TEMP. TOO HIGH`	Drying RTD is detecting out-of-range temperature above setpoint	Drying chamber temperature exceeds pre-set limit	warning
`AL: LOAD DOOR DID NOT OPEN`	Load door did not open after DOOR OPEN touch pad was pressed (power door units only)	Door remains closed after DOOR OPEN command	error
`AL: LOAD DOOR OPEN DURING PROCESS`	Load door has been opened during processing	Load door opened while cycle is running	warning
`AL: PURE H20 TAN FAILED TO REACH TEMP.`	Pure water temperature is dropping below pre-set level	Pure water tank temperature fails to reach or maintain setpoint	error
`AL: PURE H20 TAN TOO LONG IN FILL`	Tank has taken too long to fill with water; fault may be due to insufficient water supply or water level sensor malfunction	Pure water tank fill cycle exceeds time limit	error
`AL: PW TANK RTD DEFECTIVE`	Pure water tank RTD is detecting out-of-range temperatures	RTD sensor reads outside acceptable range	error
`ALRM: PURE H2 a TEMP. TOO HIGH`	Pure water tank RTD is detecting out-of-range temperature above setpoint	Pure water tank temperature exceeds pre-set limit	warning
`AL: SUMP RTD DEFECTIVE`	Sump RTD is detecting out-of-range temperatures	RTD sensor reads outside acceptable range	error
`AL: SUMP WATER TEMP. TOO HIGH`	Sump RTD is detecting out-of-range temperature above setpoint	Sump water temperature exceeds pre-set limit	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.