KI-OM-0591 Rev 3
25
Troubleshooting
Motor fault - will not run.
Fault in wiring to contractor, control
circuit to 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.
Electrical supply greater than 2%
below specified minimum.
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 water on pump as
well as causing seals to leak and allow
water into crankcase. Refer to Pump
Troubleshooting, 5.1 and 0.
Sea water mixing with
fresh water.
Faulty check valve in sea water
circuit.
Remove, clean reassemble or
replace.
Hot water output will not
maintain control.
Too many or too few heaters on.
Check graphs and table to determine
amount of heat necessary.
Temperature Control valve faulty.
Clean and check or replace.
Emergency Corrective Action
Shut temperature control valve off by
depressing the button on the side of
the valve actuator housing and turn
the lever fully clockwise. Then use the
manual bypass valve to manually
control output temperature.
Large flow in overboard
dump line.
Leaking relief valve.
Clean relief valve and reset. If valve
continues to leak, replace.
Problem
Possible Cause
Solution
Summary of Contents for WHE - 3
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