Toshiba RAV-SM304ATJP-E, Service Manual

Page: 51 / 101

FILE NO. SVM-1
4059
Operation of diagnostic function
Check code
Indoor unit
H03
P03
P04
P05
P20
P22
P26
P29
Current detection circuit error
Discharge temp. error
∗
Discharge temp. (TD) over
specified value was detected.
High pressure SW system error
Power supply voltage error
High pressure protective operation
s During cooling operation, outdoor
temp. sensor (TL) detected
temperature over specified temp.
s
During heating operation, indoor
temp. sensor (TC, TCJ) detected
temperature over specified temp.
Outdoor fan system error
Short-circuit error of compressor
driving element
Position detection circuit error
Status of
air conditioner
Stop
Stop
Stop
Stop
Stop
Stop
Stop
Stop
Condition
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Displayed when
error is detected
Judgment and measures
1. Check outdoor P.C. board.
H04
Case thermostat operation
*Abnormal overheat of compressor
Stop
Displayed when
error is detected
1. Check case thermostat and its connector
2. Check gas leak, recharge
3. Check full open of service valve
4. Check PMV (Pulse Motor Valve)
5. Check broken pipe
(AC current detection circuit)
1. Check refrigerating cycle (Gas leak)
2. Check PMV (Pulse Motor Valve)
3. Check discharge temp. sensor (TD).
1. Check service valves are fully opened.
(Gas side, Liquid side)
2. Check outdoor fan operation.
3. Check motor error of outdoor fan.
4. Check clogging of outdoor PMV.
5. Check clogging of heat exchanger in indoor/outdoor units.
6. Short-circuit of suction/discharge air in outdoor unit.
7. Check outdoor P.C. board error.
8. Check fan system error (Cause of air volume drop) at
indoor side.
9. Check PMV opening status in indoor unit.
1. Check power supply voltage. 50 Hz : AC 198 to 264 V,
60 Hz : AC 198 to 242 V
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.
50 Hz : AC 198 to 264 V, 60 Hz : AC 198 to 242 V
3. Check outdoor P.C. board.
1. When performing operation while taking-off compressor wire.
If P26 error occurs, check control P.C. board.
2. When performing operation while taking-off compressor wire.
If an error does not occurs, compressor is layer short.
1. Check control P.C. board.
Cause of errors
–
5 1
–
SVM-13072.indb 56 SVM-13072.indb 56 11/01/13 1:53 PM 11/01/13 1:53 PM