Carrier 40TGV0131UP Service Manual page 55

Operation of diagnostic function
Check code
Cause of errors
Indoor unit
H03 Current detection circuit error
Case thermostat operation
H04
*Abnormal overheat of compressor
Discharge temp. error
P03
∗ Discharge temp. (TD) over
specified value was detected.
P04 High pressure SW system error
P05 Power supply voltage error
High pressure protective operation
ë During cooling operation, outdoor
temp. sensor (TL) detected
P20
temperature over specified temp.
ë 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
Position detection circuit error
P29
Status of
Condition
air conditioner
Displayed when 1. Check outdoor P.C. board.
Stop
error is detected
1. Check case thermostat and its connector
2. Check gas leak, recharge
Displayed when
Stop
3. Check full open of service valve
error is detected
4. Check PMV (Pulse Motor Valve)
5. Check broken pipe
1. Check refrigerating cycle (Gas leak)
Displayed when
Stop 2. Check PMV (Pulse Motor Valve)
error is detected
3. Check discharge temp. sensor (TD).
1. Check service valves are fully opened.
2. Check outdoor fan operation.
3. Check motor error of outdoor fan.
4. Check clogging of outdoor PMV.
Displayed when
Stop 5. Check clogging of heat exchanger in indoor/outdoor units.
error is detected
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
9. Check PMV opening status in indoor unit.
Displayed when 1. Check power supply voltage. 50 Hz : AC 198 to 264 V,
Stop
error is detected
1. Check outdoor heat exchanger sensor (TL).
2. Check indoor heat exchanger sensor (TC, TCJ).
3. Check full open of service valve.
Stop Displayed when 4. Check indoor/outdoor fan.
error is detected
5. Check PMV (Pulse Motor Valve).
6. Check clogging and short circuit of indoor/outdoor heat
7. Overcharge of refrigerant. Recharge
1. Check lock of fan motor.
Displayed when 2. Check power supply voltage.
Stop
error is detected
3. Check outdoor P.C. board.
1. When performing operation while taking-off compressor wire.
Stop
Displayed when
2. When performing operation while taking-off compressor wire.
error is detected
Displayed when 1. Check control P.C. board.
Stop
error is detected
- 55 -
Judgment and measures
(AC current detection circuit)
(Gas side, Liquid side)
indoor side.
60 Hz : AC 198 to 242 V
exchanger.
50 Hz : AC 198 to 264 V, 60 Hz : AC 198 to 242 V
If P26 error occurs, check control P.C. board.
If an error does not occurs, compressor is layer short.