9
SECTION 5
TROUBLESHOOTING
Caution! Any troubleshooting involving electrical or refrigeration must only be carried out by
Licensed Persons. Any electrical work is to be undertaken with the unit electrically isolated.
Machine Will Not Start
As a safety feature, the Heat Pump has a programmed time delay between provision of power and unit
start, usually a few minutes. Wait for this time delay before making the following checks:
Check electrical supply to the unit is ON.
Check phases are in correct rotation (for three phase units only)
Check water flow
Check electrical for loose connections and wiring.
Check supply fuse.
Check thermostat is correctly set.
Pool Will Not Heat
Check that the ejected air temperature is colder than incoming air. If so, this means the unit is
extracting heat from the air and transferring this to water.
Check that the evaporator and internal pipes sweating. This is evidence of heat removal from the air,
suggesting that the heater is working.
Check inlet louvres, outlet grill and evaporator coil has satisfactory airflow and is not clogged.
Check that thermostat is correctly set
Check that water pump is running
Check water filter is operational
Check that inlet valves are not closed
Check ambient air temperature suits design standards
Compressor Will Not Run
Possible Cause
Possible Solution
Overload switch cut-out
Find cause of overload and reset unit by switching OFF then
ON.
System stopped on safety lockout
A disturbance in water flow may have triggered the safety
lockout. Reset unit by switching OFF, then ON.
If unit does not respond, mechanic to fit gauges and check
refrigerant charge and HP/LP operation.
Possible condenser water flow failure.
Check condenser pump water entering temperature and flow
rate.
Motor windings faulty
Contact Rheem Thermal.
Compressor Motor Hums But Will Not Start
Possible Cause
Possible Solution
Low voltage
Provide adequate voltage.
Wrong motor connections
Check with name plate or wiring diagram.
Tight or seized compressor
Replace.
No power on one phase
Check circuit breakers, main switch and wiring for fault.
