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TROUBLESHOOTING
AHU-KIT temperature sensor OPEN/SHORT error
Outdoor unit display
Explanation
When OPEN/SHORT signal is received for temperature sensor of AHU-KIT
Reason
Poor connection between sensor and the PBA, or poor conditioned sensor.
1) Self check
Is indoor room temperature
sensor connector properly
connected to PBA socket?
Check the resistance value of room
temperature sensor connector and the
PBA after disconnecting them.
Is the resistance value larger
than the number shown in
the table on the right?
Change the Control-KIT PBA.
Note
• Wired remote controller will show the same error shown in the outdoor unit.
(Continued)
(ROOM sensor OPEN/SHORT)
(IN sensor OPEN/SHORT)
(OUT sensor OPEN/SHORT)
Yes
Yes
Yes
No
Connect the temperature sensor
connector to the PBA socket and
restart the system.
Temp.(°C)
70
60
50
40
30
20
10
0
-10
No
Change the room temperature sensor.
24
Resistance
value ( ㏀ )
2.2
3.0
4.2
5.8
8.3
12.1
18.0
27.3
43.0
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