Hayward HP21404TC HeatPro_Square_Manual_Rev_G_5148 - Page 28

51300003301G Problem Unit is not operating. Table 6: Troubleshooting Lookup Chart Possible Cause Possible Solution(s) No power to unit Breaker is tripped Thermostat not turned up high enough 5 minute delay timer still running Low water flow Outside temperature too low Make sure power is on. Check the breaker / see note above Turn thermostat up until unit comes on Be sure the 5 minute delay has passed Make sure filter is clean Make sure filter pump is on Unhook cleaning devices Check outside ambient temperature or wait for warmer temperatures to operate. (refer to Operating section) Fan not functioning Call for service. Heat pump is running but is not heating; "Run" light does not come on. Heat pump runs continually Heat pump is cycling (on / off too quickly) Check output air temperature to input air temperature. Differential should be at least 8ºF (4ºC) System Component failure. Thermostat set too high Evaporator is dirty. Electrical component failure Bad valve or improper water flow Low refrigerant, low ambient temp, or high humidity with low ambient temp Condensation Low ambient air temperature. Allow outside air temperature to exceed 50ºF, then re-check Call for service. Turn thermostat down Clean it by running tap water over the coil without additional nozzle attachment. Do not use pressurized water as it can damage the coil and void warranty. Turn off pump. If the unit is still running after 2 minutes, turn off the power to the unit and call for service. Check valve settings and ensure water flow is sufficient (is the filter pump running continually?) If heat pump continues to cycle, turn unit off to prevent compressor damage. Check evaporator coil for severe frost. Turn unit off to prevent compressor damage. If heat pump continues to cycle, turn unit off to prevent compressor damage. Call for service. This is normal and there is no reason to be concerned Water is coming from bottom of unit Possible water leak Turn the unit off for several hours, but leave the filter pump running continuously. If water quantity decreases, then it is only condensation. Otherwise there is a possible leak. 28 USE ONLY GENUINE REPLACEMENT PARTS