Rotenso ANERU Series, Service Manual

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 Troubleshooting 42 
6.18 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.
Replace the inverter module
PCB.
Yes
6.19 PC 0L (Low ambient temperature protection)
Description : It is a protection function. When compressor is off, outdoor ambient temperature(T4) is lower than -35
o
C.
for 10s, the AC will stop and display the failure code.
When compressor is on, outdoor ambient temperature(T4) is lower than -40 o C.for 10s, the AC will stop and display the
failure code.
When outdoor ambient temperature(T4) is no lower than -32
o
C.for 10s, the unit will exit protection.