Mini VRF SYSTEM
Trouble Diagnosis
3
3-47
3. Mini VRF System Alarm Codes
Replace the HIC PC board and operate the unit. (Apply putty and
screws must not be loose) Does it operate normally?
9-1
See what happens.
10-1
Yes
No
Replace the control PC board and operate the unit.
10-1
See what happens.
9 Check the
HIC PC
boards
10 Check the
outdoor
unit main
PC board
(Check content of 7) The test check of the HIC board is only a check on the output level, so the input stage may not be working.
•
With the filter board broken, alarm P16 may not be triggered.
•
Measure with an analog tester. (Set to the k ohm range.)
•
Measure the board by itself. (Remove wires connected from other parts.)
•
Measure using IPM terminals.
Conforming part resistance value (measure with an analog tester)
•
Excepting the parts of “
value is “0 = short-circuit”.
”, it is acceptable if a small resistance value appears as a reference value unless the
•
HIC board IPM Pass/Fail Tests
Tester terminals
-
Resistance value (ohm)
U
1 k to 5 k
V
1 k to 5 k
W
1 k to 5 k
U
1 k to 5 k
V
1 k to 5 k
W
1 k to 5 k
NU
5 k to 10 k
U
100 k to
V
100 k to
W
100 k to
P
100 k to
P
NU
+
Tester terminals
+
Resistance value (ohm)
P
NU
-
U
100 k to
100 k to
V
100 k to
W
100 k to
V
W
NU
U P
V
W
NU
U P
Single-phase outdoor unit HIC board
3-phase outdoor unit HIC board
SM830209-00̲Mini̲VRF SYS.indb 47
SM830209-00̲Mini̲VRF SYS.indb 47
2012/01/11 18:25:39
2012/01/11 18:25:39
