Mitsubishi PWFY-P36NMU-E-BU Service Handbook page 76

(5) Simple checking procedure for individual components of main inverter circuit
Leave the power turned off for 10 minutes, check that the voltage between pins 1 and 3 of CN631 on the control
board is 20V or below, and remove the circuit board or the parts from the control box. When any problem is found
with the circuit board or other parts, replace them.
P a t r n a m e
INV board See "
Noise filter board Measure the resistance between terminal RS: 20 ohm
(Inrush current
limiting resistor)
Noise filter board
(Electromagnetic
relay 52C)
AC reactor ACL Measure the resistance between terminals: 1ohm or lower (almost 0 ohm)
Measure the resistance between terminals and the chassis:
Inverter output related troubles
This electromagnetic relay is rated at DC12V and is driven by a coil.
Check the resistance between terminals (52C on the noise filter board)
Parts Checkpoints
Between pins 1 and 2 of CN52C
Coil
Contact Both ends of RS
J u d g m e t n m e h t o
"( 9 [3] - 5 - (2) )(page 71)
10%
Criterion value
Not to be short-circuited
(Center value 16 ohm)
20 ohm 10%
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d