Indoor unit Controller PCB Circuit
Indoor Temperature Thermistor
Indoor unit thermistor is open or short is detected always.
1. Connector failure connection
2. Thermistor failure
3. Controller PCB failure
Test 2 : Remove connector and check Thermistor resistance value
Thermistor Characteristics (Rough value)
If Thermistor is either open or shorted, replace it and reset the power.
Test 1 : Check connection of Connector
Check if connector is loose or removed
Check erroneous connection
Check if thermistor cable is open
>>
Reset Power when reinstalling due to removed connector or incorrect wiring.
6.5
95
8.0
86
10.0
12.5
15.8
20.2
25.9
33.6
77
68
59
50
41
32
Temperature (°F )
3.6
4.3
5.3
Resistance value (k )
122
113
104
Temperature (°F )
OK
OK
Test 3 : Check voltage of Controller PCB (DC5.0V)
Make sure circuit diagram of each indoor unit and check terminal voltage at Thermistor (DC5.0V)
If the voltage does not appear, replace Controller PCB and execute the check operation again.
BLACK
BLACK
BLACK
BLACK
1
2
1
2
1
2
1
2
CN3
CN1
1
2
3
1
2
3
RED
WHITE
Trouble shooting 6
INDOOR UNIT Error Method:
Indoor Room Thermistor Error
Temperature (°C )
Temperature (°C )
0
40
45
50
5
10
15
20
25
30
35
Resistance value (k )
THERMISTOR
( ROOM TEMP. )
THERMISTOR
( PIPE TEMP. )
02-08
Indicate or Display:
Outdoor Unit : No indication
Indoor Unit : Operation lamp: 4 times Flash, Timer lamp: 1 times Flash
Economy lamp: Continuous flash.
ERROR CODE : [E : 41]
Forecast of Cause:
Detective Actuators:
Detective details:
Содержание R410A
Страница 3: ...1 DESCRIPTION OF EACH CONTROL OPERATION R410A WALL MOUNTED type INVERTER ...
Страница 23: ...2 TROUBLE SHOOTING R410A WALL MOUNTED type INVERTER ...
Страница 63: ...3 APPENDING DATA R410A WALL MOUNTED type INVERTER ...
Страница 76: ...Jan 2016 Printed in Japan 3 3 17 Suenaga Takatsu ku Kawasaki 213 8502 Japan ...