Troubleshooting; Machine Will Not Start; Pool Will Not Heat; Compressor Will Not Run - Rheem RTHP009 Installation Maintenance And Service Manual

SECTION 5
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
Overload switch cut-out
System stopped on safety lockout
Motor windings faulty

Compressor Motor Hums But Will Not Start

Possible Cause
Low voltage
Wrong motor connections
Tight or seized compressor
No power on one phase

TROUBLESHOOTING

Possible Solution
Find cause of overload and reset unit by switching OFF then
ON.
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.
Contact Rheem Thermal.
Possible Solution
Provide adequate voltage.
Check with name plate or wiring diagram.
Replace.
Check circuit breakers, main switch and wiring for fault.
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