Carrier 40MBFAQ Service Manual page 30

40MBFAQ: Service Manual
DIAGNOSIS AND SOLUTION (CONT.)
PC 0L (Low ambient temperature protection)
Description: This is a protection function. When the compressor is off, the outdoor ambient temperature(T4) is lower
 
than -31 F (-35 C) for 10s, the air conditioner stops and displays the failure code.
When the compressor is on, the outdoor ambient temperature(T4) is lower than -40
code. When the outdoor ambient temperature (T4) is no lower than -25.6
EC 0d(Outdoor unit malfunction Diagnosis and Solution)
Description: The indoor unit detect the outdoor unit is error.
Recommended parts to prepare:
• Outdoor unit
Troubleshooting
Refer to the prescribed steps
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Is the main board
displaying an error?
?
Yes
 
F(-40 C).for 10s, the air conditioner stops and displays a failure
 
F (-32 C) for 10s, the unit exits protection.
,
.
No
board display an error code several
Yes
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