Watter Saver HPWH500AAOC Installation, Operation And Maintenance Manual - page 12
MADE IN ROME, NY, USA
WATTERSAVER™ HEAT PUMP WATER HEATER
12
NO HOT WATER
Insufficient Power To Unit. Verify power supply.
Defective Upper Electrical Element. Replace upper
electrical element.
Defective Thermostat. Replace thermostat.
Defective Control Board. Replace control board.
Defective Upper Temperature Sensor. Replace upper
temperature sensor.
High Temperature Cutout Switch Is Open. Reset high
temperature cutout switch by removing top element cover
and pushing the red “reset” button until it clicks.
INSUFFICIENT HOT WATER
Defective Temperature Sensors. Replace temperature
sensors.
Thermostat Too Low. Increase thermostat setting.
Unit Undersized For Application. Install adequately
sized water heater.
Defective Upper Element. Replace upper element.
Piping Is Incorrect. Refer to “Piping Installation” on page
6 of this IOM.
Long Runs Of Exposed Piping Or Hot Water Piping In
Exposed Wall. Insulate piping.
Sediment Or Lime In Tank. Flush tank as described on
page 11 of this IOM.
Leaking Faucets. Repair faucets.
Loss Of Charge. See warranty.
SLOW HOT WATER RECOVERY
Defective Upper Electrical Element. Replace upper
electrical element.
Defective Control Board. Replace control board.
Defective Upper Or Lower Temperature Sensors. Re-
place temperature sensor(s).
Loss Of Charge. See warranty.
COMPRESSOR WILL NOT TURN ON
Manual Bypass Switch On Control Board Is In The
“Elec” Position. Switch manual bypass switch to the
“HP” position.
Ambient Conditions Outside Heap Pump’s Operating
Range. Heat pump designed to operate in ambient con-
ditions above freezing.
Wiring May Be Incorrect. Verify wiring with wiring dia-
gram.
HIGH TEMPERATURE CUTOUT
SWITCH ACTIVATED
Defective Upper Or Lower Temperature Sensors - Replace
temperature sensor(s).
Defective High Temperature Cutout Switch -Replace
high temperature cutout switch.
Defective Control Board - Replace control board. (See
warranty)
Wiring Of Upper Or Lower Temperature Sensor May
Be Incorrect - Verify wiring with wiring diagram.
Stacking -See Stacking on page 10.
EVAPORATOR FROSTING OR ICING
Defective Evaporator Temperature Sensor. Replace
evaporator temperature sensor.
Loss Of Refrigerant Charge/Leak In Heat Pump Sys-
tem. Repair leak and reprocess heat pump system with
16 ounces of R134A. (See warranty)
Defective Thermoexpansion Valve (TXV). Replace
TXV. (See warranty)
Poor Air Flow. Ensure operation of both fans, verify
evaporator coil and air filter are not dirty, and make sure
airflow to inlet or outlet is not blocked.
IMPORTANT: Fan cycling may occur in ambient condi-
tions greater than 90 F.
T&P VALVE DRIPPING
System Pressure Too High. Decrease system pressure.
Improperly Seated T & P Valve Seal. Refer to “T & P
valve” on page 5 of this IOM.
Defective T & P valve. Replace T & P valve.
WATTERSAVER™ TROUBLESHOOTING GUIDE
CONTINUED