Carrier 42QFD048D8S Service Manual page 73

IPM malfunction or IGBT over-strong current protection
PC 00
Over voltage or over low voltage protection
PC 01
Top temperature protection of compressor
PC 02
Inverter compressor drive error
PC 04
PFC module protection
PC 0F
Communication error between outdoor main chip and compressor
PC 40
driven chip
High pressure protection or low pressure protection
PC 03
Outdoor unit malfunction
EC 0
Indoor and outdoor mismatch malfunction
FL 09
For other errors:
The display board may show a garbled code or a code undefined by the service manual. Ensure that this code is not a
temperature reading.
Troubleshooting:
Test the unit using the remote control. If the unit does not respond to the remote, the indoor PCB requires replacement.
If the unit responds, the display board requires replacement.
88 flash frequency:
... ...
 Troubleshooting 5
TS09-L
TS10-L
TS11-L
TS09-L
TS13-INV/TS28

TS30
TS33
TS18
TS37