Troubleshooting - Whirlpool AD70USS Manual

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Disconnect power before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or electrical shock.
PROBLEM
1. Unit not turned "ON" or not set dry
2. No power to unit.
Unit will not run - no fan
and no compressor.
3. Bucket In/Water Level switch open.
4. Defective power supply cord or loose
5. Defective humidistat.
1. Mechanical Models: Deicer thermostat
Fan runs - compressor
2. Electronic Models: Thermistor out of
does not run.
3. Compressor overload or relay defective. 3. Check both components and replace, if defective.
4. Compressor windings open.
1. Fan motor not getting power.
Fan does not run -
2. Fan motor defective.
compressor runs.
3. Fan blade jammed.
Fan and compressor run -
1. Ambient room temperature is too cold
evaporator coil frosted over.
1. Unit out of refrigerant.
Fan and compressor run -
2. Humidity too low.
no dehumidification.
3. Dirty evaporator or blocked air filter.
1. Area is not sealed off - open doors and/
2. Grilles obstructed.
Unit runs - insufficient
3. Dirty evaporator or blocked air filter.
dehumidification.
4. Low refrigerant charge.
5. Unit too small for area being

TROUBLESHOOTING

Electrical Shock Hazard
CAUSE
enough.
wiring in unit.
open.
range or evaporator is less than 30°F.
(non deicer model).
or windows.
dehumidified.
1. Set control to "CONTINUOUS." This will allow the fan and com-
pressor to run regardless of the ambient humidity.
2a. Power supply cord not plugged in. Plug in cord.
2b. Unit plugged into outlet that has no power to it (blown fuse or
tripped circuit breaker). Advise customer to correct this problem
with a qualified electrician.
3a. Empty bucket.
3b. Make sure bucket is installed properly.
3c. Check switch. Replace, if defective.
4. Check wiring and supply cord. Repair or replace defective parts.
5. Run diagnostics. Replace electronic control, if needed.
1a. Let evaporator coil thaw. Normal if coil is frosted over.
1b. Replace deicer thermostat if it is still open after coil thaws and
warmed up.
2a. Unit in defrost mode. Raise room temperature.
2b. Run diagnostics. Replace electronic control, if needed.
4. Check continuity and replace if one or both windings are open.
1. Check wiring. Repair or replace, as necessary.
2. Replace fan motor.
3. Remove obstruction. Replace if fan blade is damaged.
1. Turn unit off until room temperature reaches 65°F (18.3°C).
1. Follow sweep charge procedure to find and repair leaks.
2. Turn unit off until humidity goes up.
3. Clean air filter and/or evaporator.
1. Isolate area by closing doors and windows.
2. Move unit or items so grilles are not blocked.
3. Clean air filter and/or evaporator.
4. Follow sweep charge procedure to find and repair leaks.
5. Close off into smaller area.
5-2
CORRECTION

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