Rheem 953060DP Owner's Manual And Installation Instructions page 26

To check whether there may be a problem, switch the power to the water
heater off and on again at the circuit breaker to the water heater, then open
a hot tap and allow to run for ten to fifteen minutes. The heat pump, if working
properly, will activate and continue operating to heat the water. Close the hot
tap when the heat pump begins to operate.
However, if the heat pump deactivates within five minutes, there may be a
problem. Phone your nearest Rheem Service Department or Accredited
Service Agent (or Service Centre in NZ) to arrange for an inspection.
•
Incorrect Phase Rotation
The phase fail relay will open circuit if the heat pump has been wired with
incorrect phase rotation or if a phase has failed. Both green and yellow LEDs
on the relay will be illuminated if all phases are available and phase rotation
is correct.
•
Heat pump circulator has failed
If the heat pump circulator has failed, the heat pump will not operate and may
trip on a fault. Phone your nearest Rheem Service Department or Accredited
Service Agent (or Service Centre in NZ) to arrange for an inspection.
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