Toshiba RAV-GP561ATW-E Service Manual page 71

Operation of diagnostic function
Check
Cause of operation
code
Case thermostat operation
* Abnormal overheat of compressor
H04
High pressure SW system trouble
P04
Power supply voltage trouble
High pressure SW system trouble
P05
High pressure protective operation
* During cooling operation, outdoor
temp. sensor (TL) detected
temperature over specified temp.
P20
* During heating operation, indoor
temp. sensor (TC, TCJ) detected
temperature over specified temp.
Outdoor fan system trouble
P22
Short-circuit trouble of compressor
driving element
P26
Position detection circuit trouble
P29
Status of air
Condition
conditioner
Displayed
Stop when trouble is
detected
Displayed
Stop when trouble is
detected
Displayed
Stop when trouble is
detected
Displayed
Stop when trouble is
detected
Displayed
Stop when trouble is
detected
Displayed
Stop when trouble is
detected
Displayed
Stop when trouble is
detected
Displayed
Stop when trouble is
detected
71
Judgment and measures
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 264 V)
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 264 V)
3.Check outdoor P.C. board.
1.When performing operation while taking-off compressor
wire, P26 trouble occurs. Check outdoor P.C. board
(GP56: MCC-1768, GP80: MCC-1705).
2.When performing operation while taking-off compressor
wire, an trouble does not occur.
(Compressor layer short-circuit )
1.Check outdoor P.C. board
(GP56: MCC-1768, GP80: MCC-1705).