Toshiba RAV-GM901KRTP Series Service Manual page 51

Operation of diagnostic function
Check code
Indoor unit Cause of operation
High Wall
Discharge temp. error
P03 ∗ Discharge temp. (TD) over
specified value was detected.
P04 High pressure system error
P05 Power supply voltage error
Heat sink overheat error
P07
∗ Heat sink temp. sensor detected
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 error
∗ 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.
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 error
Short-circuit error of compressor
P26
driving element
P29 Position detection circuit error
Status of
Condition
air 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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Judgment and measures
1. Check refrigerating cycle (Gas leak).
2. Trouble of electronic expansion valve.
3. Check discharge temp. sensor (TD).
1. Freezing cycle overload operation.
2. Check outdoor heat exchange sensor (TE).
3. Check outdoor P.C. board.
4. Check high-pressure switch and circuit.
1. Check power supply voltage. (AC208V/230V ±10V)
1. Check screw tightening between PC. 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 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 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. (AC208V/230V ±10V)
3. 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 control P.C. board.