Detective Actuators:
Indoor unit Controller PCB
Room temperature thermistor
Detective details:
Room temperature thermistor is open or short is detected always.
Forecast of Cause :
1. Connector failure connection 2. Thermistor failure 3. Controller PCB failuer
Check Point 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.
Check Point 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
8.0
10.0
12.5
15.8
20.2
25.9
33.6
4.4
5.3
Resistance value (k )
OK
OK
Check Point 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.
DC
BLACK
BLACK
1
2
4
CN1
BLACK
BLACK
3
1
2
4
3
Thermistor( Pipe temp.)
Thermistor( Room Temp.)
02-14
Trouble shooting 11
INDOOR UNIT Error Method:
Indoor Room Thermistor Error
Temperature
(°C )
Temperature
(°C )
0
40
45
5
44.0
-5
10
58.3
-10
15
20
25
30
35
Resistance value (k )
Indicate or Display:
Indoor Unit :
Operation lamp: 4 times Flash,
Timer lamp : 1 times Flash
ERROR CODE : [E : 41]
Wired Remote Controller
:
AMP Air Conditioning
www.ampair.co.uk | [email protected]