Toshiba RAS-M10YKV-E Service Manual page 61

10-7. 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.
LED display
D11 D12 D13
¤
¤
¤ ¤
¤
¤ ¤
¤
¤ ¤
¤ ¤ ¤
*
¤ ¤
3
*
¤ ¤ ¤
2, 3
*
¤ ¤
1
*
1
¤ ¤ ¤
*
3
*
¤
2, 3
*
¤ ¤
3
¤
¤
¤ ¤
1 Back-up operation is performed without block display of the indoor unit.
*
2 Operated normally when the air conditioner is driven in one room only. If operating in two rooms, block-
*
display is performed (Instant and after approx. 30 minutes passed), the operation stops.
3 Refer to measures when indoor check code is "1C".
*
Indoor
check
D14 D15
code
None During normal operation
Compressor thermo. operation, instantaneous power failure, gas
07
leak
14 IGBT short circuit, compressor motor rear short
16 Position-detect circuit error
17 Current-detect circuit error
¤
18 Outdoor heat exchanger temp. sensor (TE) error
¤
18 Suction temp. sensor (TS) error
19 Discharge temp. sensor (TD) error
1A
Outdoor fan error
¤
1B
Outside temp. sensor (TO) error
1C Compressor system error
¤
1C A room gas side temp. sensor (TGa) error
¤
–– Gas leakage, TS sensor disconnection, P.M.V. sensor error
Indoor heat exchanger sensor (TC) disconnection, P.M.V. sensor
¤
––
error
Indoor/outdoor miswiring, gas leakage, TS/TC sensor
¤ ¤
1C
disconnection, P.M.V. sensor error
¤ ¤
1C TGa sensor disconnection, P.M.V. sensor error
¤ ¤
1C Communication error between MCU
¤
1D Compressor lock
¤
1E
Discharge temp. error, gas leakage
¤
1F
Compressor break down
Wiring port
D11 D12 D13 D14 D15
¤
: LED ON, : LED OFF
Description
– 61 –
LED (Red)
Fig. 10-7-1
P.M.V. : Pulse modulating valve