Toshiba RAV-GM1601AT8P-E Service Manual page 68

Check Outdoor
code LED display
[H03]
[H04]
[L10]
[L29]
[P03]
Check and troubleshooting
(Item without special mention Indicates part of outdoor unit.)
[Current detection circuit error]
Check outdoor P.C. board.
Defect → Replace
[Case thermostat operation]
Are CN500 connection and
case thermostat correct?
YES
Short each pins of CN500.
Can compressor operate?
YES
Is there gas leak?
Is there refrigerant shortage?
NO
Is service valve fully opened?
YES
Is PMV under correct conditions?
YES
[Unset model type] : Only when service P.C. board is used
Cut jumper line according
to the explanation sheet packaged
with the service P.C. board.
[Communication error between MCUs] or
[EEPROM on MCC-1603 error, EEPROM on MCC-1627 error]
Check outdoor P.C. board.
Defect → Replace
[Discharge temp. error]
Is there gas leak?
Is there refrigerant shortage?
NO
Is PMV under correct conditions?
YES
Does an abnormal overload happen?
NO
Is connection of CN603 correct?
Is resistance value of TD sensor correct?
YES
Check outdoor P.C. board.
Defect → Replace
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NO
Correct connector.
Case thermostat error → Replace
NO
Check outdoor P.C. board.
Defect → Replace
YES
Repair defectives position.
Recharge refrigerant.
NO
Open service valve fully.
NO
Correct defective position.
Replace defective part.
Check crushed or broken pipe.
Defect → Correct and Replace
YES
Repair defective position.
Recharge refrigerant.
NO
Repair defective position.
Replace defective part.
YES
Remove and improve
the cause of overload.
NO
Correct connector.
Sensor error → Replace