JFD KI40018AA, Operation And Maintenance Manual, Page: 39 / 110

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KI-OM-6768 R0 Chapter 5
Water Will Not Heat Circuit breakers tripped in heating
circuits. Switch off - reset breaker(s). If
breaker(s) trip again when switched
on, investigate cause. (In an
emergency faulty element may be
switched off, leaving other banks
operational).
Manual overboard dump valve open. Close manual overboard dump valve.
Temperature control valve is stuck in
the fully open position due to valve or
actuator failure. Check the actuator function by
manipulating the actuator manually. If
the valve cannot be turned manually
service or replace the control valve. If
the actuator does not return when
released from manual disturbance
repair of replace the actuator.
Relief Valve Will Not
Close Dirt lodged in seat of relief valve. Clean seat of relief valve, reset and
test.
Motor Fault - Will Not
Run Fault in wiring to contactor, control
circuit or main control circuit is broken. Trace wiring; make sure there is no
broken circuit to wiring. If there is,
correct malfunction. If main power
control circuit is open, it may be due to
some other fault in system such as low
water, over temperature relay created
open circuit, or float switch indicating
low water. If any of these fault
indicators are on corrective action is
required.
Overload relay tripped. Reset overload relay and make sure
that relay is set in the “automatic”
position.
Defective pump motor contactor. Remove and replace.
Burned out motor. Replace motor.
Pump Chattering
Loudly Low inlet water pressure with restricted
flow. Increase inlet water pressure and flow
rate to unit.
Pump supply “pressure reducing”
regulator malfunction. Clean regulator and reassemble. If
unit will not regulate pressure on pump
to 2.5 bar, replace or repair regulator.
Emergency Corrective Action
Bypassing the regulator will allow
operation in an emergency but this is
not recommended as this will put
increased load and wear on pump as
well as causing seals to leak and allow
water into crankcase. Refer to Pump
Troubleshooting, section and
Appendix I -, page 49.
Sea Water Mixing With
Fresh Water Faulty check valve in sea water circuit. Remove, clean reassemble or replace.
Problem Possible Cause Solution