-
357
-
'12 • PAC-T-173
(6)
Power transistor module (including the driver PCB) inspection procedure
Compressor operation
Replace the outdoor
unit inverter PCB
Normal
YES
YES
YES
NO
NO
NO
Is the power
transistor module
cracked or burnt?
Is there a
short circuit between the
power transistor module
terminals?
1
If there is a 10% or greater difference
in the current in different phases.
(except during acceleration or deceleration)
Is there any difference in
the compressor current
between phases?
*1
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 te rminal.
P: Power transistor P terminal,
N: Power transistor N terminal,
U: End of red harness to compressor
V: End of white harness to compressor
W: End 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 controller
incorporated.
Tester
Normal values (
:
)
Terminal
(+)
Terminal
(-)
Model 71
Model 100-140
P
N
0 -
(Numerical
value rises.)
Approx. 1 M
Approx.
300-400
N
P
P
U
Several M
(Numerical
value rises.)
0
P
V
P
W
N
U
Approx. 650 k Approx. 1.2 M
N
V
N
W
U
P
Approx. 670 k
Approx. 1.3 M
V
P
Approx. 4.4 M
W
P
Approx. 4.4 M
U
N
Approx. 650 k
0
V
N
$SSUR[0
W
N
Approx. 4.9 M
If the measured values range from 0 ~ several kW, there is a possibility
that the elements are damaged, so replace the power transistor parts.
Summary of Contents for FDC Series
Page 95: ... 94 12 PAC T 173 Models FDT100VF 125VF 140VF H H H H H C B A F G D G PJF000Z285 ...
Page 98: ... 97 12 PAC T 173 Models FDEN60VF 71VF C 2 C 1 A B A B D C 1 C 2 C 1 C 2 E G F B PFA003Z817 ...
Page 113: ... 112 12 PAC T 173 b Wireless remote controller RCN E1R 60 17 150 Unit mm ...
Page 278: ... 277 12 PAC T 173 ー K ...
Page 346: ... 345 12 PAC T 173 Power PCB 1BSU OVNCFS 4GRNCEG VJG 2 ...
Page 518: ... 517 12 PAC T 173 3 5 SUPER LINK E BOARD SC ADNA E F SL2NA E and SL3N AE BE to control ...
Page 519: ... 518 12 PAC T 173 ...
