Toshiba RAV-GM1601AT8P-E Service Manual page 62

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.
4-way valve system error
• After heating operation has
P19
started, indoor heat
exchangers temp. is down.
Gas leak detection
* Discharge temp. sensor (TD),
P15 Suction temp. sensor (TS)
detected temperature over
specified temp.
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
Stop
Displayed when
(Automatically
error is detected
reset)
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 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 4-way valve.
2. Check PMV
3. Check indoor heat exchanger (TC/TCJ).
4. Check indoor P.C. board.
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 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 LED display on outdoor P.C.board
(MCC-1626) by refer the next page.
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.