Malmet WDS1 - Fault Codes

Bedpan / Urinal Bottle and Utensil / Bowl Washer Disinfector (WDS)
Operation, Maintenance and Installation Manual
Issue 16 Page 30 August 22
5.6 Fault Codes
The operation of the WDS is controlled by a micro-processor. The processor has fault detection capability and indicates faults by
code on the LCD display as well as an audible buzzer.
Software V5.00
FAULT
CODE
STATE
DESCRIPTION
POSSIBLE CAUSES
901
System
Blockage
P or S trap blockage to drain
902
System
Door open during wash cycle
Faulty door micro-switch J11, J10, actuator,
transformer fuse
903
System
Internal system communications error
Display unplugged, LINK J34 removed, loose
processor PCB
904
System
Power interrupted during cycle
Mains power supply interrupted
905
System
Power button cycle aborted
Wash cycle aborted prior to completion
906
System
Blockage during purge reset
P or S trap blockage to drain
907/908
System
Steam generator temp sensor fault
Open/Closed Circuit
909/910
System
Tank water temp sensor fault
Open/Closed Circuit
911/912
System
Chamber temp sensor fault
Open/Closed Circuit
101
Power On
Water fill timeout - Water tank and
steam generator
Water level sensor failed or water supply low
flow or turned off, water fill solenoids failed
102
Power On
Steam fill timeout
Steam fill solenoid failed, steam level sensor
failed, blocked inlet hose
120
Power On
Blockage at power on
P or S Trap blockage to drain. Faulty sensor
141
Open Door
Door overcurrent trip
Door is obstructed, actuator motor faulty, door
hinges seized
143
Open Door
Door timeout
Actuator motor faulty, blown transformer fuse,
door hinges seized
149
Open Door
Door interlock switches fault
Door interlock switch J11 stuck on when door
opens
181
Close Door
Door overcurrent trip
Door is obstructed, actuator motor faulty, door
hinges seized
183
Close Door
Door timeout
Actuator motor faulty, blown transformer fuse,
door hinges seized
220
Cold Flush Fill
Water level sensor fail
Dirty conductivity sensor probe, faulty
connections, faulty conductivity module
221
Cold Flush Fill
Water fill timeout
Water level sensor failed or water supply low
flow, water fill solenoid failed, water supply off
241
Cold Flush Run
Low water level during wash
Check cycle time, pump rate too high, water
Leakage
242
Cold Flush Run
Door open
Door opened during wash cycle, faulty door
interlock switch J11 J10
243
Cold Flush Run
Pump run without solenoid
Check cycle times parameters, faulty solenoids
244
Cold Flush Run
Timeout before level reached
Low pump water flow, blocked rotary nozzles,
faulty 1” solenoid, panel lockout switches J8
open circuit. Faulty level probe. Door interlock
switch J11 J10
260
Cold Wash Fill
Water level sensor fail
Dirty conductivity sensor probe, faulty
connections, faulty conductivity module
261
Cold Wash Fill
Water fill timeout
Water level sensor failed or water supply low
flow, water fill solenoid failed, water supply off
281
Cold Wash Run
Low water level during wash
Faulty 4 -way solenoid, panel lockout switches
J8 open circuit. Faulty level probe. Incorrect
spray nozzles fitted