ACPro Y Series Troubleshooting Manual page 42

7.18 PC 45 (Outdoor unit IR chip drive failure diagnosis and solution)
Description: When the IR chip detects its own parameter error, the LED displays the failure code when power on.
Recommended parts to prepare:
• Inverter module PCB.
Troubleshooting and repair:
Power off,then restart the unit
2 minutes later.
Yes
Replace the inverter module
PCB.
7.19 PC 0L (Low ambient temperature protection)
Description: It is a protection function. When compressor is off, outdoor ambient temperature(T4) is lower than -35 C.
o
for 10s, the AC will stop and display the failure code.
When compressor is on, outdoor ambient temperature(T4) is lower than -40 C.for 10s, the AC will stop and display the
o
failure code.
When outdoor ambient temperature(T4) is no lower than -32 C.for 10s, the unit will exit protection.
o
Troubleshooting 42