Toshiba RAV-GM 801UT-E Service Manual page 67

Operation of diagnostic function
Check code
Cause of operation
Indoor unit
Discharge temp. trouble
∗ Discharge temp. (TD) over
P03
specified value was detected.
Case thermostat operation
H04
∗ Abnormal overheat of compressor
P04 High pressure SW system trouble
Power supply voltage trouble
P05
High pressure SW system trouble
High pressure protective operation
∗ During cooling operation, outdoor
temp. sensor (TL) detected
P20
temperature over specified temp.
∗ During heating operation, indoor
temp. sensor (TC, TCJ) detected
temperature over specified temp.
P22 Outdoor fan system trouble
Short-circuit trouble of compressor
P26
driving element
P29 Position detection circuit 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
Stop
trouble is detected
Displayed when
Stop
trouble is detected
Displayed when
Stop
trouble is detected
Displayed when
Stop
trouble is detected
– 67 –
Judgment and measures
1. Check refrigerating cycle (Gas leak)
2. Trouble of electronic expansion valve
3. Check discharge temp. sensor (TD).
1. Check case thermostat and connector.
2. Check gas leak, recharge
3. Check full open of service valve.
4. Check PMV (Pulse Motor Valve).
5. Check broken pipe.
1. Check service valves are fully opened.
(Gas side, Liquid side)
2. Check of outdoor fan operation.
3. Check motor trouble of outdoor fan.
4. Check clogging of outdoor PMV.
5. Check clogging of heat exchanger in indoor/outdoor units.
6. Short-circuit status of suction/discharge air in outdoor unit.
7. Check outdoor P.C. board trouble.
8. Check fan system trouble (Cause of air volume drop)
at indoor side.
9. Check PMV opening status in indoor unit.
1. Check power supply voltage. AC198 to 264V
1. Check service valves are fully opened.
(Gas side, Liquid side)
2. Check of outdoor fan operation.
3. Check motor trouble of outdoor fan.
4. Check clogging of outdoor PMV.
5. Check clogging of heat exchanger in indoor/outdoor units.
6. Short-circuit status of suction/discharge air in outdoor unit.
7. Check outdoor P.C. board trouble.
8. Check fan system trouble (Cause of air volume drop)
at indoor side.
9. Check PMV opening status in indoor unit.
1. Check outdoor heat exchanger sensor (TL).
2. Check indoor heat exchanger sensor (TC, TCJ).
3. Check full open of service valve.
4. Check indoor/outdoor fan.
5. Check PMV (Pulse Motor Valve).
6. Check clogging and short circuit of indoor/outdoor heat
exchanger.
7. Overcharge of refrigerant. Recharge
1. Check lock of fan motor.
2. Check power supply voltage between L2 and N.
AC198 to 264V
3. Check outdoor P.C. board.
1. When performing operation while taking-off compressor
wire, P26 trouble occurs. Check control P.C. board
(MCC-1705).
2. When performing operation while taking-off compressor
wire, an trouble does not occur. (Compressor rare short)
1. Check control P.C. board (MCC-1705).