Hayward HP21124T Heat Pump Installation Manual - Page 27

TABLE 6: Troubleshooting Lookup Chart Problem Possible Cause Possible Solution(s) No power to unit Make sure power is on. Breaker is tripped Check the breaker / see note above. Thermostat not turned up high enough Turn thermostat up until unit comes on. 5-minute delay timer still running Be sure the 5-minute delay has passed. Unit is not operating Low water flow Make sure filter is clean. Make sure filter pump is on. Unhook cleaning devices. Outside temperature too low Check outside ambient temperature or wait for warmer temperatures to operate (refer to Operation section). Fan not functioning Call for service. Heat pump is running but is not heating; "Run" light does not come on. Check output air temperature to input air temperature. Differential should be at least 8°F (4°C). System component failure Low ambient air temperature. Allow outside air temperature to exceed 50°F, then re-check. Call for service. Thermostat set too high Turn thermostat down. Heat pump runs continuously Evaporator is dirty 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. Electrical component failure Turn off pump. If the unit is still running after 2 minutes, turn off the power to the unit and call for service. Bad valve or improper water flow Check valve settings and ensure water flow is sufficient (is the filter pump running continuously?). If heat pump continues to cycle, turn unit off to prevent compressor damage. Heat pump is cycling on/off too quickly Low refrigerant, low ambient temp, or high humidity with low ambient temp 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. Condensation This is normal and there is no reason to be concerned. Water is coming out from bottom of unit Possible water leak Turn the unit off for serveral hours, but leave the filter pump running continuously. If water quantity decreases, then it is only condensation. Otherwise, there is a possible leak. 26 USE ONLY HAYWARD GENUINE REPLACEMENT PARTS