Mitsubishi Electric PUZ-ZM200YKA2-ET Service Manual page 73

Outdoor power circuit board
PUZ-ZM200YKA2.UK
PUZ-ZM200YKA2(-ET/-ER)R1
PUZ-ZM250YKA2.UK
PUZ-ZM250YKA2(-ET/-ER)R1
Diode module
TB-P1
Connect to the DCL
TAB connector
on X52CA
Connect to the
RS resistor
TB-L1,
TB-L2,
TB-L3
Connect to the outdoor
noise filter circuit board
(LO1, LO2, LO3)
400 VAC
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
TB-P3
Connect to the DCL
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 VAC
N2
L3 N1
CN6
Thermistor
<Heat sink> (TH8)
73
W V U P2
L3OUT-L3IN
Lead connect
DIP-IPM