– 62 –
Wiring port
D11 D12 D13 D14 D15
LED (Red)
10-6. Trouble Diagnosis by Outdoor LED
For the outdoor unit, the self-diagnosis is possible by
five LEDs (Red).
• LEDs (Red) (D11 to D15) are provided on the
sub-control board under surface of the inverter,
and as shown below, they are checked from the
wiring port when removing the wiring cover.
1. If a trouble occurs, LED (Red) goes on accord-
ing to the trouble as described in the table below.
2. When two or more troubles occur, LEDs go on
cyclically.
3. Usually, LEDs (Red) go off.
Fig. 11-6-1
¤
: LED ON,
l
: LED OFF P.M.V. : Pulse modulating valve
LED display
D11 D12 D13 D14 D15
lllll
¤
llll
l
¤
lll
¤¤
lll
ll
¤
ll
l
¤¤
ll
¤¤¤
ll
lll
¤
l
¤
l
¤
ll
*
2
¤¤¤¤
l
*
2
¤
lll
¤
*
2
¤¤
ll
¤
*
1
l
¤¤
l
¤
*1
¤¤¤l ¤
lll
¤¤
¤¤
l
¤¤
¤
ll
¤
l
l
¤
l
¤
l
¤¤
l
¤
l
Indoor
check
code
None
07
14
16
17
19
1A
1B
1C
––
––
––
––
––
—
1C
1D
1E
1F
Description
During normal operation
Compressor thermo. operation, instantaneous power failure,
gas leak
IGBT short circuit, compressor motor rear short
Position-detect circuit error
Current-detect circuit error
Discharge temp. sensor (TD) error
Outdoor fan error
Outside temp. sensor (TO) error
Compressor system error
A room gas side temp. sensor (TGa) error
B room gas side temp. sensor (TGb) error
C room gas side temp. sensor (TGc) error
Gas leakage, P.M.V. sensor error
Indoor heat exchanger sensor (TC) disconnection, P.M.V.
sensor error
Indoor/outdoor miswiring, gas leakage, TC sensor
disconnection, P.M.V. sensor error
Communication error between MCU
Compressor lock
Discharge temp. error, gas leakage
Compressor break down
*
1 Back-up operation is performed without block display of the indoor unit.
*
2 Operated normally when the air conditioners in other rooms are driven.
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