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
9
7
7
7
7
Normal
9
7
7
7
8
Malfunction of fin thermistor
3
9
8
8
7
7
Sensor malfunction
0
9
8
7
7
8
Insufficient voltage
3
9
7
7
8
7
Instantaneous over-current
3
9
7
8
8
8
Electronic thermistor
3
9
8
8
8
8
Stall prevention
3
9
7
8
7
7
Open phase detection
3
7
7
7
7
7
Malfunction of microcomputer
Unlimited
Summary of Contents for R407C PLUS
Page 1: ...System R407C PLUS Series Heat Recovery System Si33 105 Service Manual ...
Page 11: ...Introduction Si33 105 x ...
Page 41: ...Specifications Si33 105 30 Specifications R407C PLUS Series Heat Recovery System ...
Page 147: ...Test Operation Si33 105 136 Test Operation R407C PLUS Series Heat Recovery System ...
Page 263: ...Si33 105 iv Index ...
