FILE NO. SVM-13004
Block distinction Operation of diagnosis function
Check
code
Block
Check
code
Cause of operation
Air
conditioner
status
Display
flashing error
Action and Judgment
– 82 –
Return signal of the outdoor Indoor unit Flashes when 1. Check power supply (Rate +
10%)
unit has been sent when operates error is detected. 2. If the air conditioner repeat operates
operation start. But after continue. Flashing stop and stop with interval of approx. 10
that, signal is stop some time. Outdoor unit and outdoor unit to 40 minutes.
Instantaneous power stop. start to operate Check protector (hardware) such
failure. when the return as Hi-Pressure switch,
Some protector signal from the Thermal-Relay, etc.
(hardware) of the outdoor unit is Check refrigerant amount, packed
outdoor unit open normal. valve opening and any possibility
circuit of signal. cause which may affect high
Signal circuit of indoor temperature or high pressure.
P.C. board or outdoor 3. Check operation signal of the indoor
P.C. board is failure unit by using diode. Measure voltage
in some period. at terminal block of the indoor unit
between No.2 and No.3 (or L2 and S)
If signal is varied 15-60V continuously,
replace inverter P.C. board.
If signal is not varied, replace indoor
P.C. board.
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