Service manual

M411433 19
Section 3 Troubleshooting
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
W002
WARNING
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
16. WATER IN STEAM LINE - STEAM MODELS
17. TROUBLESHOOTING ELECTRONIC CONTROL MODELS
POSSIBLE CAUSE TO CORRECT
Incorrect installation of steam piping. • Refer to Installation Manual (supplied with tumbler) for
steam requirements.
Trap functioning improperly. • Check trap for size and capacity. If trap is dirty or
sluggish, clean thoroughly or replace. Check return line
for high back pressure.
PROBLEM POSSIBLE CAUSE TO CORRECT
Display shows “PF”
(MM models)
Tumbler has not been run in last six
days.
Power tumbler for at least two continuous days to
recharge battery.
A custom cycle has not been
programmed into memory.
Enter a custom cycle into memory.
Discharged battery. If tumbler has been powered for at least two
continuous days, replace battery.
Door Open light and
display flash with door
closed
Door switch needs adjustment. Adjust and test door switch.
Door switch faulty. Replace door switch.
Electrical service connected
incorrectly.
Check service connections to terminal block in
junction box. For 120 or 240 Volt tumblers,
neutral wire must be connected to terminal
marked “NEUT”. On single phase tumblers, hot
wire must be connected to terminal marked “L1”.
A ground wire must be secured to the ground
screw in the junction box.
Display shows “SH”
and signals sounds
Temperature at sensor is over 191°F
(88.3°C).
Allow tumbler to cool and press ON/SELECT
pad. If display still shows “SH”, replace sensor.
Temperature sensor shorted. Replace temperature sensor.
Display shows “OP”
and signal sounds
three minutes after
tumbler is started
Temperature at sensor is under 24°F
(-4.4°C).
If the temperature of the tumbler is above 24°F
(-4.4°C), replace temperature sensor.
Temperature sensor open. Replace temperature sensor.