Mitsubishi Electric Mr. Slim PUHZ-ZRP35VKA Service Manual page 79

Outdoor power circuit board
PUHZ-ZRP100YKA
PUHZ-ZRP125YKA
PUHZ-ZRP140YKA
Diode module
TAB connector
on X52CA
Connect to the
RS resistor
CN4
Connect to the
outdoor controller
circuit board (CN4)
CN2
Connect to the outdoor controller circuit board (CN2)
1–5: Power circuit board
signal to the controller board (0–5 V DC)
2–5: Zero cross signal (0–5 V DC)
3–4: Not used
6–5: 16 V DC
7-5: 16 V DC
[ 5 : – 1, 2, 6, 7 : + ]
OCH527C
Note: T he marks L1 , L2 , L3 , N1 , N2 , P1 , P2 , U , V and W
TB-N
Connect to the CK capacitor
P1 L1 L2
CN5
Detection of primary
current (Connect to
the outdoor noise filter
circuit board (CNCT))
Transmitting
→
Brief Check of POWER MODULE
U sually, they are in a state of being short-circuited if they are broken.
Measure the resistance in the following points (connectors, etc.).
If they are short-circuited, it means that they are broken.
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
shown in the diagram are not actually printed on the board.
N2
L3 N1
CN7
Connect to the
outdoor converter
circuit board (CN7)
CN6
Thermistor
<Heat sink> (TH8)
79
TB-U, TB-V, TB-W
Connect to the compressor (MC)
Voltage among phases:
10–400 V AC
W V U P2
TB-L1, TB-L2, TB-L3
Connect to the outdoor
converter circuit board
(L1-OU, L2-OU, L3-OU)
400V AC
DIP-IPM