Midea MDV-V140W/DRN1 User Manual

R410A All DC Inverter Mini VRF MCAC-VTSM-2016-10
94 Troubleshooting
3. Check the +15V circuit according to corresponding wiring diagram. If CN5 on inverter module output voltage is not +15V means the
inverter module is failed. If voltage output of inverter module is +15V means main PCB is failed.
4. To check for three phase bridge rectifier:
Method 1: measure the resistance between any two terminals of the 5 terminals. if any of the resistance is nearly 0, the three phase
bridge rectifier is failed.
Method 2: dial the multimeter to diode gear:
1) Put the red pen in negative pole of DC power output terminal (terminal 5), then put black pen in terminal 1, 2 and 3 in turn. The
voltage should be around 0.378V. If the voltage is 0, the three phase bridge rectifier is failed.
2) Put the red pen in positive pole of DC power output terminal (terminal 4), then put black pen in terminal 1, 2 and 3 in turn. The
voltage should be infinite. If the voltage is 0, the three phase bridge rectifier is failed.
COMP.
U
V
W
U
V
W
CAP1
R2
HEAT1
STF1
SV5
BLUE
Y/G
Y/G
S V6
CN17
IC201
CN205
CN19
DIS1
CN11
CN6
CN8
CN9
CN10
CN22
CN201
A2
A1
O RANGE
5
4
~
~ ~
1
2
3
D1
R1
CAP2
FAN-DOWN
Y/G
FAN-UP
Y /G
CN7 0
CN7 1
BLUE
BR OWN
2
GND_2
CN30
CN31
CN32
L1 ’
L2
’
L3 ’
CN19(CN18)
CN18(CN19)
GND_1
POWER & FILTER
BOARD
MAIN BOARD
U
V
W
CN2
CN1
P N
CN5
IPM MODULE
BLUE
WHITE(BROWN)
RED
BLUE
RED( BROWN )
RED
Y/G
B LA CK
ZR1
RED
RED
RED
BLACK
BLACK
RED
BLACK
ORANGE
BLUE
BLUE
BLUE
BLUE
BLUE
BLUE
ORANGE
BLACK
BLACK
RED
BLUE
2
ORAN GE
RED
L
CT1
IC201
CN250
BLACK
RED
BLUE(BROWN)
BLUE
RED
Z
T4
T3
T5
H-PRO
L-PRO
CN36CN36
L1
CN37
L2
CN38
L3
CN39
N
EE V.
CN36CN36
CN37
CN38
CN39
TO IND OOR
COM M. BU S
NOTE：PLEASE USE
3-CORE SHIELDE D WIRE
T O C CM .
CO MM . B US
POWER SUPPLY
BLACK
W HITE
XT2
WHITE
BLUE
BLACK
BLACK
RED
GRAY
BLACK
C
Y/G
CN36
XT1
NO
Y /G
L1
L2
N
L3
RED
W HIT E
BLUE
BLACK
CT 1
S
T
R
KM2
COM
RED
BLUE
WHITE
RED
YELLOW
2
2
4
2
BLACK(RED)
RED
RED(
BLACK)
RED
PTC1
PTC2
KM1
22
21
1
A1
2
6
4
A2
T
T
BROWN(RED)
3
5
BR OWN(RE D)
RED
3
CN 46(C N58)
C N56( CN59)
CN45(CN56)
C N55(C N57)
CN48(CN62)
CN 58(C N63)
C N47(C N60)
CN57(CN61)
C N49( CN64 )
CN 59(C N65)
Single or three
phase AC power
input
DC power
output: positive
pole
DC power
output: negative
pole
Schematic diagram
Voltage output of
CN5 should be +15V
P N +15 terminal

Midea MDV-V140W/DRN1 Specifications

General

Brand	Midea
Model	MDV-V140W/DRN1
Category	Inverter
Language	English