Fault Diagnosis - Whirlpool 6ADP905/3 WH Service Manual

WHIRLPOOL CONSUMER SERVICES

FAULT DIAGNOSIS

F1 NTC (Negative Temperature Co-efficient of Resistance) Device
- Temperature is outside normal range -3°C to +85°C
- Temperature inside the wash chamber is over +85°C
- The device is either open circuit or short circuit.
F2 Water Leakage
Water is in drip tray
- Float switch (LS6) operates, closes the water inlet valve and turns on the drain
pump until the water Indicator (WI) reports empty.
F3 Heating System Defective
Indicated after approximately 11 minutes of heating operation.
- Element (HEW) defective
- Relay (RE2) on control board is defective
- NTC resistance fluctuation
- Water indicator (WI) defective (open-circuit)
- Spray pump is not working
F4 Draining Failure
Drain pump energised and after four minutes Water Indicator (WI) still detects water.
- Drain pump (DPM) defective
- Drain hose blocked
- Control board defective
- Water Indicator defective (Pressure switch contacts remain closed)
F5 Spray Arm Blocked. (Fault does not cause dishwasher to stop)
SAB sensor sends less than 10 pulses/minute.
- SAB sensor defective
- Spray arm blocked or not located correctly
- Spray pump motor inefficient (insufficient water flow through pump.
F6 Water Control Cock Closed
Water valve (WV1) is energised but flow meter (FM) sends no impulses to CPU (less
than 10 impulses in 10 seconds) and the water indicator is at low level.
- Water inlet control cock closed
- Water inlet hose blocked or kinked
- Water inlet valve (WV1) blocked or defective
- Flow Meter (FM) or connecting leads defective
Models 6ADP905/3 WH
Page 16 of 19