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WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
PROBLEM
Heater will not heat
Temperature too low
Temperature too high
Too much pressure drop / fluid will
not flow
Leakage from end plates
12
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Troubleshooting
Before servicing this equipment always make sure to
relieve the pressure.
Check all possible problems and solutions before
disassembling the heater.
CAUSE
No current.
Faulty circuit board.
Burned out heater element.
Fluid requires more warmup time.
Wrong temperature setting.
Flow rate too high.
Clogged fluid passages.
Faulty circuit board.
Wrong temperature setting.
Faulty circuit board.
Flow rate too high.
Clogged fluid passages.
Loose bolts, damaged seals.
SOLUTION
Check circuit, fuses.
Replace the cover and circuit board
assembly (20).
Replace the housing.
Increase warmup time.
Adjust the knob.
Reduce flow rate or use two
heaters.
Clean. Flush regularly.
Replace the cover and circuit board
assembly (20).
Adjust the knob.
Replace the cover and circuit board
assembly (20).
Reduce flow rate or use two heat-
ers.
Clean. Flush regularly.
Tighten or replace seals.
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