-
192
-
'15 • HM-T-246
LE D
U
V
W
LED1
LED3
LED5
LED2
LED4
LED6
LED1
LED3
LED5
LED2
LED4
LED6
LED1
LED3
LED5
LED2
LED4
LED6
LED1
LED3
LED5
LED2
LED4
LED6
LED1
LED3
LED5
LED2
LED4
LED6
LED1
LED3
LED5
LED2
LED4
LED6
〜
ON /OFF
status of LE D
If all of LE D are ON /OFF
according to following pattern
If all of LE D stay OFF or
some of LE D are ON /OFF
Inverter P CB N ormal Anomalous
15 sec.
5sec.5sec.
5sec.
During this period, ON /OFF status of LE D is
repeated cyclically according to following pattern
(1) Checking procedure of inverter PCB
1) Setup procedure of checker.
a) P ower OFF (Turn off the breaker).
b) Remove the terminal cover of compressor and disconnect the wires (U, V , W) from compressor.
c) Connect the wires U (Red) , V (White) and W (Black) of checker to the terminal of disconnected wires (U, V , W
)
from compressor respectively.
2) Operation for judgment.
a) P ower ON after SW10-4 on inverter P CB was turned ON .
b) A
fter 15 seconds since the test operation has started, LE D start ON /OFF for 5 seconds cyclically and it repeats 10 times
.
c) Check ON /OFF status of 6 LE D' s on the checker.
d) Judge the P CB by ON /OFF status of 6 LE D' s on the checker.
e) Be sure to turn off SW10-4 on inverter P CB, after finishing the check operation.
P ower ON or start check operation
123 10
Cyclically
ON
OFF
Red
Black
White
Faston terminal
Inverter Checker
Connect to the terminal of the wires which are disconnected from compressor.
LED ON/OFF pattern
(2) Power transistor module terminal short circuit check procedure
Disconnect the compressor wiring, then conduct a short circuit check.
P -U, P -V , P -W
N -U, N -V , N -W
Check between the P -N terminals.
Bring the tester probes in contact with the following
places on each terminal.
P : P ower transistor P terminal,
N : P ower transistor N terminal,
U: E nd of red harness to compressor
V : E nd of white harness to compressor
W: E nd of black or blue harness to compressor
Check for a power transistor short circuit.
•
When you do not have a diagnostic checker for judging if the inverter is
defective, measure between the terminals of the power transistor parts, judge
whether the power transistor is defective or not.
• Disconnect the compressor, then measure with the control incorporated.
Tester N ormal values (W)
Terminal
(+ )
Terminal
(-)
E SA30E
P N Scores of M
N P A few of M
P U Scores of M
P V Scores of M
P W Scores of M
N U
N V
N W
U P
V P
W P
U N Scores of M
V N Scores of M
W N Scores of M
the elements are damaged, so replace the power transistor parts.
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