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Failure Diagnosis for Inverter System
4.2
How to Use The Monitor Switch on The Inverter PC Board
The monitor lets you know the contents of the latest stop due to malfunction by LED display on the inverter
PC Board. The inverter is equipped with a retry function that retries operation each time stop due to
malfunction occurs, and malfunction is therefore not ascertained by merely entering the five minutes
standby while retry is attempted the prescribed number of times. If the number of retry times is exceeded
within 60 minutes, malfunction is ascertained, and the corresponding malfunction code is displayed on the
indoor unit remote controller.
9
8
7
534
LED
A
1
9
7
7
9
9
8
9
8
9
7
9
7
9
8
9
7
7
7
: Blink
: On
: Off
2
3
4
7
7
7
Normal
7
7
8
Malfunction of fin thermistor
8
7
7
Sensor malfunction
7
7
8
Insufficient voltage
7
8
7
Instantaneous over-current
8
8
8
Electronic thermistor
8
8
8
Stall prevention
8
7
7
Open phase detection
7
7
7
Malfunction of microcomputer
Troubleshooting UM Combination "MA1R Series" Using R-407C
PACD011001C2
Malfunction contents
Retry times
3
0
3
3
3
3
3
Unlimited
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Troubleshooting
