Mitsubishi Electric PUZ-ZM200YKA2-ET Service Manual page 72

Outdoor power circuit board
PUZ-ZM100YKA2(-ET/-ER).UK
PUZ-ZM125YKA2(-ET/-ER).UK
PUZ-ZM140YKA2(-ET/-ER).UK
TB-N
Connect to the CK capacitor
Diode module
TAB connector
on X52CA
Connect to the
RS resistor
TB-L1,
TB-L2,
TB-L3
Connect to the out-
door converter cir-
cuit board (L1-OU,
L2-OU, L3-OU)
400 V AC
CN4
Connect to the
outdoor controller
circuit board (CN4)
CN2
Connect to the outdoor controller circuit board (CN2)
– : Power circuit board
– : Zero cross signal (0–5 VDC)
– : Not used
– : 16 VDC
– : 16 VDC
OCH771C
Brief Check of POWER MODULE
If they are short-circuited, it means that they are broken.
Measure the resistance in the following points (connectors, etc.).
1. Check of DIODE MODULE
L1 - P1 , L2 - P1 , L3 - P1 , L1 - N1 , L2 - N1 , L3 - N1
2. Check of DIP-IPM
P2 - U , P2 - V , P2 - W , N2 - U , N2 - V , N2 - W
Note: The marks L1 , L2 , L3 , N1 , N2 , P1 , P2 , U , V and W
P1 L1 L2
CN5
Detection of primary
current (Connect to
the outdoor noise filter
circuit board (CNCT))
Transmitting
→
signal to the controller board (0–5 VDC)
: –
, , , : +
shown in the diagram are not actually printed on the board.
TB-U, TB-V, TB-W
Connect to the compressor (MC)
Voltage among phases:
10–400 V AC
N2
L3 N1
CN7
Connect to the outdoor con-
verter circuit board (CN7)
CN6
Thermistor
<Heat sink> (TH8)
72
W V U P2
L3OUT-L3IN
Lead connect
DIP-IPM