Toshiba RAV-GM 801UT-E Service Manual page 66

Failure mode detected by outdoor unit
Operation of diagnostic function
Check code
Cause of operation
Indoor unit
Disconnection, short of discharge
F04
temp. sensor (TD)
Disconnection, short of outdoor temp.
F06
sensor (TE)
Disconnection, short of outdoor temp.
F07
sensor (TL)
Disconnection, short of suction temp.
F12
sensor (TS)
Miss-mounting of outdoor temp.
F15
sensor (TE, TS)
Disconnection, short of outside temp.
F08
sensor (TO)
Disconnection, short of heat sink
F13
temp. sensor (TH)
F31 Outdoor P.C. EEPROM trouble
L10 Unset jumper of service P.C. board
Communication trouble between
L29
outdoor P.C. board MCU
Heat sink overheat trouble
∗ Heat sink temp. sensor detected
P07
over specified temperature.
Detection of gas leak
∗ Discharge temp. sensor (TD),
P15
Suction temp. sensor (TS) detected
temperature over specified temp.
4-way valve inverse trouble
∗ After heating operation has started,
indoor heat exchanger temp. lowers
under the specified temp.
P19
∗ After heating operation has started,
outdoor heat exchanger / suction
temp. rises over the specified temp.
Compressor break down
∗ Although operation has started,
H01
operation frequency decreases and
operation stops.
Compressor lock
∗ Over-current detection after
H02
compressor start-up
H03 Current detection circuit trouble
F23 Ps sensor trouble
Status of
Condition
air conditioner
Displayed when
Stop
trouble is detected
Displayed when
Stop
trouble is detected
Displayed when
Stop
trouble is detected
Displayed when
Stop
trouble is detected
Displayed when
Stop
trouble is detected
Displayed when
Continue
trouble is detected
Displayed when
Stop
trouble is detected
Displayed when
Stop
trouble is detected
Displayed when
Stop
trouble is detected
Displayed when
Stop
trouble is detected
Displayed when
Stop
trouble is detected
Displayed when
Stop
trouble is detected
Displayed when
Stop
trouble is detected
Displayed when
Stop
trouble is detected
Displayed when
Stop
trouble is detected
Displayed when
Stop
trouble is detected
Displayed when
Stop
trouble is detected
– 66 –
Judgment and measures
1. Check discharge temp. sensor (TD).
2. Check outdoor P.C. board (MCC-1705).
1. Check temp. sensor (TE).
2. Check outdoor P.C. board (MCC-1705).
1. Check temp. sensor (TL).
2. Check outdoor P.C. board (MCC-1705).
1. Check suction temp. sensor (TS).
2. Check outdoor P.C. board (MCC-1705).
1. Check temp. sensor (TE, TS).
2. Check outdoor P.C. board (MCC-1705).
1. Check outside temp. sensor (TO).
2. Check outdoor P.C. board (MCC-1705).
1. Check outdoor P.C. board (MCC-1705).
(Q201 is incorporated in TH sensor.)
1. Check outdoor P.C. board (MCC-1705).
1. Outdoor service P.C. board
Check model type setting jumper wire.
1. Check outdoor P.C. board
(MCC-1705).
1. Check screw tightening between PC. Board and heat
sink and check radiator grease (MCC-1705).
2. Check heat sink blast path.
1. Check gas leak, recharge
2. Check full open of service valve.
3. Check PMV (Pulse Motor Valve).
4. Check broken pipe.
5. Check discharge temp. sensor (TD), suction temp.
sensor (TS).
1. Check operation of 4-way valve.
2. Check outdoor heat exchanger (TE), suction temp.
sensor (TS).
3. Check indoor heat exchanger sensor (TC).
4. Check 4-way valve coil.
5. Check PMV (Pulse Motor Valve).
1. Check power supply voltage. (AC198 to 264V)
2. Overload operation of refrigerating cycle
1. Trouble of compressor (Lock, etc.): Replace compressor.
2. Wiring trouble of compressor (Open phase)
1. Check outdoor P.C. board (MCC-1705).
(AC current detection circuit)
1. Check connection of Ps sensor connector.
2. Check failure of Ps sensor.
3. Check compressing power trouble of compressor.
4. Check 4-way valve trouble.
5. Check outdoor P.C. board trouble.