Diagnosis And Solution - Carrier DHMVHA Service Manual

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DIAGNOSIS AND SOLUTION

EEPROM Parameter Error (EH00/EH0A)
Error Code
Malfunction decision conditions
Supposed causes
Troubleshooting
EEPROM: Read-only memory contents can be erased and reprogrammed using pulsed voltage. For the EEPROM chip location, refer to Figures 16
and 17.
NOTE: Figures 16 and 17 are for reference only and may differ from your actual unit.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
EH00/EH0A
Indoor or outdoor PCB main chip does not receive feedback from the EEPROM chip
Installation mistake
PCB Faulty
Power off the unit
and wait three minutes.
Error code
returns?
Replace the indoor/outdoor
main control boards.
Fig. 16 — Indoor PCB
Fig. 17 — Outdoor PCB (18K Model)
15
The unit is OK