Carrier 38MGRQ30D 3 Series User Manual

38MGR-04SM Specifications subject to change without notice. 61
DIAGNOSIS AND SOLUTION (CONT)
High temperature protection of condenser error (P5)
Troubleshooting
ERROR CODE P5
MALFUNCTION DECISION
CONDITIONS
When the outdoor pipe temperature is more than 149°F, the unit stops, and unit runs again when the
outdoor pipe temperature is less than 125°F
SUPPOSED CAUSES
• The condenser temperature sensor faulty
• Heat exchanger dirty
• System block
Yes
Check whether the
re
1
No
No
No
Yes
Yes
No
Yes
No
No
.
No
Yes
No
No
Yes
Yes
Condenser High Temperature Protection
Check if the condenser temp.
is higher than 149°F.
Check if the outdoor ambient
temp. is higher than 122°F.
Check if the outdoor unit
ventilation is good.
Check if the outdoor fan
runs properly.
Check if the heat exchanger is dirty.
Replace the outdoor main board.
Refrigerant is low. Add refrigerant.
Check if the refrigerant system is ok.
Clean the heat exchanger.
Refer to the Fan Speed Out of Control
malfunction solution.
Identify the cause and resolve it.
Restore good ventilation.
Stop the unit.
Check if the
condenser temp.
sensor resistance is normal.
Refer to Appendix 1.
Check the
connection between
the temperature sensor
and PCB.
Correct the connection.
Replace the temperature sensor.

Carrier 38MGRQ30D 3 Series Specifications

General

Brand	Carrier
Model	38MGRQ30D 3 Series
Category	Air Conditioner
Language	English