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FUNCTIONS AND OPERATION PRINCIPLES OF MAIN PARTS
3. Faults Symptom (Products): faulty heater
1) Heater, Sheath-ML/AL
Problem
1. Heater, Sheath heating
wire is cut, corroded, or
connecting wire is cut.
2. Evaporator is not close
enough to Heater,
Sheath-AL.
3. Poor terminal contact.
4. Moisture intrudes into
the pipe through the
crack as Heater,
Sheath-AL Pipe, and/or
Silicon Cap are dented.
2) Heater Plate (Drain)
Problem
1. Heating wire is cut or
corroded.
2. Poor terminal contact.
3. Moisture intrudes as
the heating wire is
damaged by a sharp fin
of evaporator.
Symptom
Poor Defrost
1. The resistance is infinity when it is
measured at both connector ends
with a tester.
2. Visually check for a faulty defrost
with eyes.
3. The resistance fluctuates very much
when the resistance is measured at
both ends with a tester.
Short circuit
4. When the resistance between both
connector ends is measured with a
tester, the resistance is zero or
beyond the allowance of marked
value. (allowance: marked value±7%)
Symptom
Poor defrost
1. The resistance is infinity when the
resistance is measured at both
connector ends with a tester.
2. The resistance fluctuates very
much when the resistance is
measured at both connector ends
with a tester.
Short circuit
3. When the resistance between both
connector ends is measured with a
tester, the resistance is zero or
beyond the allowance of marked
value. (allowance: marked
value±7%)
Checks
Checks
- 16 -
Measures
1. Replace parts. (Reconnect if
wire is disconnected.)
2. Move evaporator closer to
Heater, Sheath-AL.
3. Correctly insert connector.
4. Replace parts.
Measures
1. Replace parts. (Reconnect if
wire is cut)
2. Correctly reinsert the connector.
3. Replace parts.
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