Trouble shooting 14
OUTDOOR UNIT Error Method:
OK
OK
12.6
16.1
5
20.7
26.9
35.2
46.6
62.3
115.2
Resistance value (k )
0
-5
-10
-20
Temperature (°C )
10
20
15
1.6
2.4
3.5
5.2
8.0
Resistance value (k )
70
60
50
40
30
Temperature (°C )
Outdoor Thermistor Error
Outdoor Unit Main PCB
Outdoor Temperature Thermistor
When Outdoor Temperature Thermistor open or short-circuit
is detected at power ON or while running the compressor.
1. Connector connection failure
2. Thermistor failure
3. Main PCB failure
Test 1 : Check connection of connector
Check if connector is removed.
Check if connector is erroneous connection.
Check if thermistor cable is open.
>> Upon correcting the removed connector or miss-wiring, reset the power.
Test 2 : Remove connector and check thermistor resistance value
Thermistor characteristics (Approx. value)
If Thermistor is either open or shorted, replace it and reset the power.
Test 3 : Check voltage of Main PCB (DC5.0V)
Make sure circuit diagram of outdoor unit and check terminal voltage at thermistor (DC5.0V)
If the voltage does not appear, replace Main PCB.
Temperature (°F )
-4
14
23
32
41
50
59
68
Temperature (°F )
86 104 122 140 158
CN64
CN62
1
2
1
2
3 3
1
2
1
2
3 3
BLUE
BLUE
BROWN
BROWN
THERMISTOR
( OUTDOOR TEMP. )
THERMISTOR
( COMPRESSOR TEMP. )
CN65
CN63
1
2
1
2
3 3
1
2
1
2
3 3
BROWN
BROWN
BLACK
BLACK
THERMISTOR
( DISCHARGE TEMP. )
THERMISTOR
( PIPE TEMP. )
02-16
Indicate or Display:
Outdoor Unit : No indication
Indoor Unit : Operation lamp: 7 times Flash, Timer lamp: 4 times Flash
Economy lamp: Continuous flash.
ERROR CODE : [E : 74]
Detective Actuators:
Detective details:
Forecast of Cause:
Summary of Contents for R410A
Page 3: ...1 DESCRIPTION OF EACH CONTROL OPERATION R410A WALL MOUNTED type INVERTER ...
Page 23: ...2 TROUBLE SHOOTING R410A WALL MOUNTED type INVERTER ...
Page 63: ...3 APPENDING DATA R410A WALL MOUNTED type INVERTER ...
Page 76: ...Jan 2016 Printed in Japan 3 3 17 Suenaga Takatsu ku Kawasaki 213 8502 Japan ...
