DLFSAB and DLFLAB: Service Manual
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DIAGNOSIS AND SOLUTION (CONT.)
EC 0d - Outdoor Unit Malfunction Diagnosis and Solution
Description: The indoor unit detects the outdoor unit has an error.
Recommended parts to prepare:
• Outdoor unit
Troubleshooting and Repair:
DIAGNOSIS AND SOLUTION (CONT.)
PC 0L - Low ambient temperature protection Diagnosis and Solution
Description: It is a protection function. When the compressor is off, the outdoor ambient temperature(T4) is lower than -31°F (-
35°C) for 10 second, the unit stops and displays the failure code. When the compressor is on and the outdoor ambient
temperature(T4) is lower than -40°F for 10 seconds, the unit stops and displays the failure code. When the outdoor ambient
temperature(T4) is no lower than -25°F for 10 seconds, the unit exits protection.
Is the main board
displaying an error?
WŽǁĞƌŽī, then restart the unit 2
minutes later. Does the outdoor main
board display an error code a few
minutes later?
No
Yes
Refer to the prescribed
steps for resolving the
issue.
Yes