Toshiba RAS-M16UKCV-E3 - Self-Diagnosis by LED Indication; Useful Functions

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1. If a trouble occurs, LED goes on
according to the contents of trouble
as shown in the left table.
2. When two or more troubles occur,
LEDs go on cyclically (alternately).
3. Usually, LEDs (Red) go off.
LED indication
D800 D801 D802 D803 D804
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Indoor
alarm code
None
14
16
17
18
18
19
1A
1B
1C
1C
1C
1C
1C
1C
1C
1C
1C
1D
1E
1F
Contents
Normal running
IGBT short circuit, Compressor motor rare short
Trouble on position detecting circuit
Trouble on current detecting circuit
Outdoor heat exchanger temp. sensor (TE) fault
Suction temp. sensor (TS) fault
Discharge temp. sensor (TD) fault
Trouble on outdoor fan motor
Outdoor temp. sensor (TO) fault
Trouble on compressor system
Temp. sensor (TGa) fault at A room gas side
Temp. sensor (TGb) fault at B room gas side
Temp. sensor (TGc) fault at C room gas side
Temp. sensor (TGd) fault at D room gas side
Gas leakage, TS sensor out of place, PMV,
sensor fault
TE sensor out of place, indoor heat exchanger
sensor (TC) out of place, PMV, sensor fault
Miswiring at indoor or outdoor, Gas leakage,
TS, TC sensor out of place, PMV, sensor fault
Communication trouble between MCU
Compressor lock
Trouble on discharge temp, Gas leakage
Compressor break down
Self-Diagnosis by LED Indication
• For this outdoor unit, the self-diagnosis is possible by using five LEDs (1 Yellow + 4 Red).
*
LEDs (D800 to D804) are provided on P.C. board of the inverter.
Useful Functions
IGBT : Insulated Gate Bipolar Transistor
PMV : Pulse Modulating Valve
LED : Light Emitting Diode
¤
: LED ON
l
: LED OFF
*
1 : 4 units Multi model only
*
2 : Heat pump model only
Red
Yellow
D800 D801 D802 D803 D804
LED
Fig. 9-3-19
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2
*
2
*
1