56(65)
Failures
Possible reasons
Solutions
Circuit breaker tripping
off at turning on main
switch.
Short circuit of main circuit.
Transformer short circuit or
connected with earth wire.
Problems of circuit breaker.
Check electrical wire.
Replace circuit breaker.
Circuit breaker tripping
off at turning on pump
switch.
Pump motor coil short circuit.
Problems of circuit breaker.
Check pump motor.
Replace circuit breaker.
Circuit breaker
trippingoff after short
heater output.
Heater tube short circuit or shell
contact.
Problems of circuit breaker.
Replace heater tube.
Replace circuit breaker.
Summary of Contents for STM-1220-PW
Page 1: ...STM PW Series Hi Temp Water Heater Date Dec 2014 Version Ver B English ...
Page 2: ......
Page 25: ...25 65 2 3 2 Control Circuit STM PW 400V Picture 2 6 Control Circuit STM PW 400V ...
Page 29: ...29 65 2 3 5 Main Circuit STM PW 230V Picture 2 8 Main Circuit STM PW 230V ...
Page 30: ...30 65 2 3 6 Control Circuit STM PW 230V Picture 2 9 Control Circuit STM PW 230V ...
Page 62: ...62 65 ...