Panasonic CS-E18JKDW / CU-E18JKD / CS-E21JKDW / CU-E21JKD / CS-XE18JKDW / CU-XE18JKD Service Manual ▷ View online
97
16.5.30. F99 (Output Over Current Detection)
Malfunction Decision Conditions
During operation of cooling and heating, when an output over-current (18.5A) is detected by checking the current that flows in the
inverter DC peak sensing circuitry.
During operation of cooling and heating, when an output over-current (18.5A) is detected by checking the current that flows in the
inverter DC peak sensing circuitry.
Malfunction Caused
• DC peak due to compressor failure.
• DC peak due to defective power transistor(s).
• DC peak due to defective outdoor unit PCB.
• DC peak due to defective power transistor(s).
• DC peak due to defective outdoor unit PCB.
Troubleshooting
• Checking the power transistor.
• Never touch any live parts for at least 10 minutes after turning off the circuit breaker.
• If unavoidable necessary to touch a live part, make sure the power transistor’s supply voltage is below 50V using the tester.
• For the UVW, make measurement at the Faston terminal on the board of the relay connector.
• Never touch any live parts for at least 10 minutes after turning off the circuit breaker.
• If unavoidable necessary to touch a live part, make sure the power transistor’s supply voltage is below 50V using the tester.
• For the UVW, make measurement at the Faston terminal on the board of the relay connector.
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17 Disassembly and Assembly Instructions
17.1. Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor
Removal Procedures
17.1.1.
To remove front grille
17.1.2.
To remove horizontal vane
WARNING
High Voltage are generated in the electrical parts area by the capacitor. Ensure that the capacitor has discharged sufficiently before proceeding
with repair work. Failure to heed this caution may result in electric shocks.
with repair work. Failure to heed this caution may result in electric shocks.
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17.1.3.
To remove power electronic controller
100
17.1.4.
To remove discharge grille
17.1.5.
To remove control board
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