Check and Correction
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- System configuration
1-1 Is an O2 sensor being used? If Yes, see 3-1. If No, see 2-1.
- 2-1 Indoor EEPROM setting
Is the EEPROM setting, item code 0B, on the indoor control board set to 0001? If Yes, see 3-1 after modification. If No, see 4-1.
- 3-1 EXCT wiring
Is the EXCTsocket (wire) shorted? If Yes, Modify the wiring. If No, see 4-1.
- Indoor control board
4-1 Is the alarm triggered if the EXCT socket (wire) is disconnected, and the power is reset? If Yes, see 4-3. If No, see 4-2.
4-2 Since there is no error, see what happens.
4-3 Indoor control board defective → replace board
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