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Carrier 38MGRQ24C 3 Series User Manual

Carrier 38MGRQ24C 3 Series
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52 Specifications subject to change without notice. 38MGR-04SM
DIAGNOSIS AND SOLUTION (CONT)
Temperature protection of compressor top) error (PO)
Troubleshooting
ERROR CODE PO
MALFUNCTION DECISION
CONDITIONS
If the sampling voltage is not 5V, the LED displays the failure.
SUPPOSED CAUSES
Wiring mistake
Over load protector faulty
System block
Outdoor PCB faulty
Yes
No
Yes
Yes
No
Yes
.
No
.
Yes
No
Yes
No
Temperature protection of the
compressor top.
Check the air ow system of the
indoor and outdoor units.
Clear up the air inlet and outlet or the indoor
and outdoor heat exchanger.
Power OFF, then restart
the unit minutes later.
Check whether the
compressor top temperature
is higher than 212 °F (100° C).
Check the refrigerant
volume charge.
Refrigerant system is blocked, for
ex. capillary or welded point of pipes.
Check the overload protector
of the wiring connection.
Correct the connection.
Measure the resistance
between the two OLP ports.
It is zero (0)?
Replace the OLP.
Replace the outdoor main PCB.
Recharge the correct
refrigerant volume.

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Carrier 38MGRQ24C 3 Series Specifications

General IconGeneral
BrandCarrier
Model38MGRQ24C 3 Series
CategoryAir Conditioner
LanguageEnglish

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