Diagnostic Codes - Whirlpool Hybrid Electric Heat Pump Water Heater Manual

DIAGNOSTIC CODES

DISPLAY SHOWS
EUC
ELC
SF
ECF
E20 or E21
E30 or E31
E50 or E51
E10 or E11
E40 or E41
Edr
EPL
EDH
EoF
(If Accessory Condensate
Pump is installed)
ECL
EEE
ECC
"-","--","---"
ICE
HPO
NOTE: The diagnostic codes listed above are the most common. If a diagnostic code not listed above is displayed,
contact Residential Technical Assistance referencing the number on the front of this manual.
INDICATES
Upper element is not functioning
Lower element is not functioning
The air filter is dirty.
The heat pump compressor is
starting/stopping frequently.
Upper Temperature Sensor is not
functioning.
Lower Temperature Sensor is not
functioning.
Heat Pump Suction Temperature
Sensor is not functioning.
Heat Pump Coil Temperature
Sensor is not functioning.
Heat Pump Discharge
Temperature Sensor is not
functioning.
Not enough water in the tank
(tank not full).
Power supply voltage is too low.
Heat Pump Discharge
Temperature is too high.
Condensate pump failure.
Heat pump suction pressure is
too low.
EEPROM failure
Heat pump compressor is not
functioning.
Unit is doing a system diagnostic.
Heat pump is in defrosting cycle.
Heat pump is out of operation
envelope.
CORRECTIVE ACTION
1. Turn off power at the circuit breaker/fuse box and check for
a loose connection at the element. For access directions
see "Heating Element Replacement" section. If error persists
proceed to the next step.
2. Replace non-functioning element. See "Heating Element
Replacement" section.
1. Turn off power at the circuit breaker/fuse box and check for
a loose connection at the element. For access directions
see "Heating Element Replacement" section. If error persists
proceed to the next step.
2. Replace non-functioning
Replacement" section.
1. Turn off power at the circuit breaker/fuse box.
2. Clean the air filter. See "Air Filter Cleaning/Replacement"
section.
1. Turn off power at the circuit breaker/fuse box.
2. Clean the air filter. See "Air Filter Cleaning/Replacement"
section.
3. If error persist, please contact a qualified person to check the
fan wire connection.
Contact a qualified person to service the unit.
Fill completely-Open all hot water taps in home and run until water
(uninterupted) flows from all open hot water taps.
Check the power supply to the unit and make sure it is higher than
204V
Contact a qualified technician to service the unit.
1. Check to see if accessory condensate pump is plugged in and
has power. Also check circuit breaker/fuse box and GFCI (if
used). If error persists, proceed to the next step.
2. Check condensate pump outlet tube for blockage. If error
persists, proceed to the next step.
3. Check control wire connections to condensate pump. If error
persists, proceed to the next step.
4. Replace accessory condensate pump. If error persists, contact
a qualified technician to service the unit.
Contact a qualified technician to service the unit
No action is necessary.
element. See "Heating Element
17