Mini VRF SYSTEM
Trouble Diagnosis
3
3-44
3. Mini VRF System Alarm Codes
1-1
3-1
2-1
Yes
No
1 System
configuration
Is the indoor EEPROM setting, item code 0B, on the indoor unit’s
control PC board set to 0001?
2-1
After correcting the
setting, 3-1
4-1
Yes
No
2 Indoor unit’s
EEPROM
setting
P14 O
2
Sensor
Error Detection Method
Error Diagnosis
It is judged an error whenever the outdoor unit receives the signal “O
2
Alarm Occurred” from the indoor unit.
•
With the indoor unit's EEPROM setting (item code 0B) set to 0001, the EXCT input was shorted.
•
1.
2.
Is an O
2
sensor being used?
Correct wiring
4-1
Yes
No
Is the indoor EXCT socket (wire) shorted?
3-1
3
4
Indoor EXCT
wiring
4-3
4-2
Yes
No
Is the alarm triggered if the indoor EXCT socket (wire) is
disconnected, and the power is reset?
Since there is no error, see what happens.
4-1
4-2
4-3 Indoor unit control PC board error
replace PC board.
Indoor unit’s
control
PC board
SM830209-00̲Mini̲VRF SYS.indb 44
SM830209-00̲Mini̲VRF SYS.indb 44
2012/01/11 18:25:38
2012/01/11 18:25:38
