Daikin R407C PLUS - How to Use the Monitor Switch on the Inverter PC Board

Failure Diagnosis for Inverter System Si33-105
194 Troubleshooting R407C PLUS Series Heat Recovery 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
: Blink
8
: On
7
: Off
LED A 1 2 3 4 Malfunction contents Retry times
97777
Normal
97778
Malfunction of fin thermistor 3
98877
Sensor malfunction 0
98778
Insufficient voltage 3
97787
Instantaneous over-current 3
97888
Electronic thermistor 3
98888
Stall prevention 3
97877
Open phase detection 3
77777
Malfunction of microcomputer Unlimited