Shini STM-PW series, User Manual

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8-2
8. Trouble Shooting
6
Main switch indicator
won't become bright
after turning on main
switch. Pump can not
start when turning on
pump switch.
PCB output relay problems.
Pump switch problems.
Time relay (K5) problems.
Electrical circuit problems.
Check or replace the PCB.
Replace the switch.
Replace time relay.
Check electrical circuit.
7
No display of temperature
controller after turning on
pump and heater switch.
Heater switch problems.
Temperature controller problems.
Electrical circuit problems.
Replace the switch.
Replace temperature controller.
Check electrical circuit.
8
Differences between
setting temperature and
actual temperature is
too big.
Too short time after machine startup.
Temperature parameter setting error.
Cooling water valve problems.
Wait for a while.
Check temperature parameters.
Reset incorrect parameters with
reference to chapter 6.5.
Replace solenoid valve.
9
Temperature can't rise
up.
Heater contactor problems.
Heater problems.
Thermocouple problems.
Temperature controller
operation mode set to STOP.
Temperature output problems.
Replace the contactor.
Replace pipe heater.
Replace thermocouple.
Set temperature controller to
working mode.
Replace or repair temperature
parameters.
10
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.
11
Circuit breaker tripping
off at turning on pump
switch.
Pump motor coil short circuit.
Problems of circuit breaker. Check pump motor.
Replace circuit breaker.
12
Circuit breaker tripping
off at turning on pipe
heater switch.
Pipe heater short circuit or contact
with heating tank.
Problems of circuit breaker.
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Check electrical circuit.
Replace circuit breaker.
Failures Possible reasons Solutions