–148–
7) Individual Parts Failure Judgment Methods.
[Caution at replacement of inverter parts]
1
The transistor module and INV board should be replaced together at the same time.
When the transistor module is damaged, the INV board may possibly be broken, and the use of the broken INV board
damages the normal transistor module. Therefore, replace the transistor module and INV board together at the same
time. However, if the INV board is damaged, judge that the transistor module is faulty, then judge whether replacement
is necessary or not.
2
Fully check wiring for incorrect and loose connection.
The incorrect or loose connection of the power circuit part wiring like transistor module and diode module causes to
damage the transistor module. Therefore, check the wiring fully. As the insufficient tightening of screws is difficult to
find, tighten them together additionally after finishing other works. For the wiring of the base for transistor module,
observe the wiring diagram below carefully as it has many terminals.
3
Coat the grease for radiation provided uniformly onto the radiation surface of transistor/diode modules.
Coat the grease for radiation on the full surface in a thin layer, and fix the module securely with the screw for fastening.
As the radiation grease attached on the wiring terminal causes poor contact, wipe it off if attached.
Part Name
Judgment Method
Diode Stack (DS)
Refer to “Judging Diode Stack Failure.”
Transistor Module (TRM)
Refer to “Judging Transistor Module Failure.”
Thyristor Module (SCRM)
Refer to “Judging Thyristor Module Failure.”
Electromagnetic Contactor
Measure the resistance value at each terminal.
(52C1, 52C2, 52F)
Check Location
Judgment Value
A1-A2
0.1 k ~ 1.3 k
Ω
1/L1-2/T1
∞
3/L2-4/T2
5/L3-6/T3
Rush Current Protection Resistor (R1, 5)
Measure the resistance between terminals: 4.5 k ~ 5.5 k
Ω
DC Reactor (DCL)
Measure the resistance between terminals: 1
Ω
or lower
Measure the resistance between the terminals and the chassis:
∞
Cooling Fan (MF1)
Measure the resistance between terminals: 0.1 k ~ 1.5 k
Ω
Transformer (T01)
Measure the resistance between terminals on the primary side (CNTR1):
1.0 k ~ 2.5 k
Ω
Measure the resistance between terminals on the secondary side (CNTR):
20 ~ 60
Ω
Measure the resistance between terminals on the primary side (F3):
5 ~ 60
Ω
Measure the resistance between terminals on the secondary side (CNTR):
0 ~ 10
Ω
A1
A2
1/L1 3/L2 5/L3
2/T1 4/T2 6/T3
PUHY-
400/500
YMF-B
PUHN-
200/250
YMF-B
Summary of Contents for CITY MULTI PUHY-400YMF-B
Page 16: ... 13 FANCON board CNV CNW CNU CNFC2 ...
Page 17: ... 14 RELAY board CN51C2 CNOUT2 CNRT2 CN52F CN52C2 CNCH ...
Page 26: ... 23 ...
Page 50: ... 47 ...
Page 152: ... 149 Model PUHY 400YMF B 500YMF B ...
