Toshiba RAV-GM1101AT8P-E Service Manual page 50

Operation of diagnostic function
Check
Cause of operation
code
Discharge temp. error
P03 * Discharge temp. (TD) over
specified value was detected.
P04 High pressure SW system error
Power supply error
* Power supply voltage error
P05
* Open phase of 3-phase 4-wire
power supply
Heat sink overheat error
P07 * Heat sink temp. sensor detected
over specified temperature.
Gas leak detection
* Discharge temp. sensor (TD),
P15 Suction temp. sensor (TS)
detected temperature over
specified temp.
4-Way valve system error
* After heating operation
has started, indoor heat
P19
exchangers temp is down.
High pressure protective
operation
* During cooling operation,
P20
outdoor temp. sensor (TE)
detected temperature over
specified temp.
P22 Outdoor fan system error
Short-circuit of compressor
P26
drive element
P29 Position detection circuit error
Status of air
Condition
conditioner
Displayed when
Stop
error is detected
Displayed when
Stop
error is detected
Displayed when
Stop
error is detected
Displayed when
Stop
error is detected
Displayed when
Stop
error is detected
Displayed when
Stop
error is detected
Displayed when
Stop
error is detected
Displayed when
Stop
error is detected
Displayed when
Stop
error is detected
Displayed when
Stop
error is detected
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FILE NO.SVM-18044-1
Judgment and measures
1. Check refrigerating cycle (Gas leak).
2. Trouble of PMV (Pulse Motor Value).
3. Check discharge temp. sensor (TD).
1. Check service valves are fully opened.
(Gas side, Liquid side)
2. Check of outdoor fan operation.
3. Check clogging of outdoor PMV (Pulse Motor Valve).
4. Check clogging of heat exchanger in indoor/outdoor
units.
5. Short-circuit status of suction/discharge air in
outdoor unit.
6. Check outdoor P.C.board error.
7. Check fan system error (Cause of air volume drop)
at Indoor side.
8. Check PMV (Pulse Motor Valve) opening status in
indoor unit.
1. Check power supply voltage. (AC342 to 457V)
2. Check open phase of 3-phase 4-wire power supply.
1. Check screw tightening between P.C.board and
heat sink and check radiator grease.
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 4-Way valve.
2. Check PMV.
3. Check indoor heat exchanger (TC/TCJ)
4. Check indoor P.C. board.
1. Check outdoor heat exchanger sensor (TE).
2. Check full open of service valve.
3. Check indoor / outdoor fan.
4. Check PMV (Pulse Motor Valve).
5. Check clogging and short circuit of indoor / outdoor
heat exchanger.
6. Overcharge of refrigerant. Recharge.
1. Check lock of fan motor.
2. Check power supply voltage. (AC342 to 457V)
3. Check screw tightening between P.C.board and
heat sink and check radiator grease.
4. Check heat sink blast path.
5. Check outdoor P.C.board.
1. When performing operation while taking-off
compressor wire, P26 error occurs.
Check control P.C.board.
2. When performing operation while taking-off
compressor wire, an error does not occur.
Compressor rare short.
1. Check outdoor P.C.board.