52
. Troubleshooting
CPA-E and CPA-E S PWM series
Warning
Ensure that the power supply is switched off before the
pump is maintained or repaired.
Failure Control panel Cause of failure Remedy
Fuse Replace
Pump cannot Indication light blown fuse
be switched OFF Circuit breaker Connect the
on not connected circuit breaker
Motor failure Replace the pump
E Undervoltage Check the power
supply
E Pump stalling Clean the pump
Noise In W Air in system Bleed the system
generation Flow rate too high Increase the
inlet pressure
Noises generated In W Air inside pump Bleed the system
by the Inlet pressure Increase the
pump too low inlet pressure
Not hot enough In W Poor pump Increase the
performance inlet pressure
GB
High-efficiency heating and solar circulation pumps
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