Part 4 Trouble Shooting
- 97 -
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Purpose
Generation of over-current caused by
input current detection error.
Items for checking
1. Checking for current detection error
1. Set the tester in DC Voltage Mode and check the voltage.
2. Check the voltage between Input current detection signal and Micom GND.
3. The standard of normal voltage measurement is 2.5 V ±0.2 V.
4. If the measurement is different from the standard, replace PCBA.
! Caution : When the measurement is made in the state that the electricity is applied, check the tester
for being in the measurement mode and be careful to avoid possible short of the parts other
than the measuring part.
Apply the electricity.
Turn indoor devices off.
Measure voltage.
Replace PCBA.
Current detection
part is normal.
Checking method
Within 2.3~2.7V
❈ PCBA : PCB Assembly
Yes No
Input Current Detection Circuit
6.7 Troubleshooting Outdoor Error
CH 22 (Input of Over Current)
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