Outdoor Power Circuit Board; Brief Check Of Power Module - Mitsubishi Electric PUHZ-RP250YHA2 Service Manual

Outdoor power circuit board

PUHZ-RP200YHA2
PUHZ-RP250YHA2
CN2
Connect to the outdoor controller circuit
board (CN2)
-
signal to the controller board (0-5V DC)
- : Zero cross signal (0-5V DC)
- : Not used [ : –
- : 16V DC
- : 16V DC
CN4
Connect to the
outdoor con-
troller circuit
board
(CN4)
CN5
Detection of
primary current
(Connect to
the outdoor
noise filter
circuit board
(CNCT))
TB-P1 TAB connecter on
X52A
Connect to DCL
Connect to the
RS resistor

Brief check of POWER MODULE

Measure the resistance in the following points (connectors, etc.).
If they are short-circuited, it means that they are broken.
1. Check of POWER MODULE
Note:The marks, L1 , L2 , L3 , N1 , N2 , P1 , P2 , U , V and W
shown in the diagram are not actually printed on the board.
, , ,
TB-C1
Connect to the
smoothing capacitor
–
CB1 , CB2
Usually, they are in a state of being short-circuited if they are broken.
.Check of DIODE circuit
L1 - P1 , L2 - P1 , L3 - P1 , L1 - N1 , L2 - N1 , L3 - N1
.Check of IGBT circuit
P2 - U , P2 - V , P2 - W , N2 - U , N2 - V , N2 - W
SC-U, SC-V, SC-W
Connect to the compressor (MC)
Voltage among phases: 10V-400V AC
TB-P2
Connect to the smoothing
capacitor CB1
+
59
TB-L1, TB-L2,
TB-L3
Connect to the
outdoor noise fil-
ter circuit board
(L01, L02, L03)
380V-415V AC
POWER
MODULE
TB-N1
Connect to the
smoothing capacitor
CB2
+
–