Wiring Diagram; Refrigerant System Diagram - Mitsubishi Electric MFZ-KA25VA Service Manual

6

WIRING DIAGRAM

MFZ-KA25VA
MFZ-KA35VA
MFZ-KA50VA
INDOOR UNIT
TO OUTDOOR
UNIT
CONNECTING
SYMBOL NAME
DB111 DIODE STACK
F11 FUSE (T3.15AL250V)
LS1 DAMPER LIMIT SWITCH (OPEN)
LS2 DAMPER LIMIT SWITCH (CLOSE)
MF1 UPPER INDOOR FAN MOTOR
MF2 LOWER INDOOR FAN MOTOR
ML1 DAMPER LOCK MOTOR (RIGHT)
NOTE:1. About the outdoor side electric wiring refer to the outdoor unit electric wiring diagram for servicing.
2. Use copper conductors only. (For field wiring)
3. Symbols below indicate.
/: Terminal block,
: Connector
7

REFRIGERANT SYSTEM DIAGRAM

MFZ-KA25VA
MFZ-KA35VA
MFZ-KA50VA
INDOOR UNIT
DISP REC
P.C.BOARD
MODELS WIRING DIAGRAM
1
CN
RT15 TB
TAB3
2
106
230V~ S1 BLK
3
CN113
4
S2
1
BLU
RT12
2
2
12-24V S3 RED
3
RT13 CN112
1
4
5
RT14
CN201
6
CN
RT11
111
CN
LS1
1X1
LD104
CN
LS2
CN CN 1Y1
151 1R1
TB
3
BLK
230V~ S1
CN201
2
WHT
S2
1
TO OUTDOOR
WHT
2
5
UNIT
12-24V S3 RED
CONNECTING
INTERLOCK POWER MONITOR
MV
SWITCH(FAN) RECEIVER P.C.BOARD
SYMBOL
ML2
MV1
MV2
NR11
RT11
RT12
RT13
Indoor
heat
exchanger
Distributor
Indoor coil
thermistor
RT12, RT14,
RT15 (main)
RT13 (sub)
Room temperature
thermistor
RT11
Refrigerant flow in cooling
Refrigerant flow in heating
MV1 ML1 MV2 ML2 MF1
5
5 5 5 5
2 6
INDOOR ELECTRONIC
CONTROL P.C. BOARD
CN CN CN 1
F11
125 151 152
2
3
4
DB111
T111
5
6
NR11
CN211
F11
DB111
T11
NR11
LD LD
101(A) 105(T)
3
2
6
CN202
2
INDOOR ELECTRONIC
LD103
CONTROL P.C. BOARD
1
SW P.C.
GRN
BOARD
NAME
DAMPER LOCK MOTOR (LEFT)
HORIZONTAL VANE MOTOR
DAMPER MOTOR
VARISTOR
ROOM TEMPERATURE THERMISTOR
INDOOR COIL THERMISTOR (MAIN 1)
INDOOR COIL THERMISTOR (SUB)
Refrigerant pipe [9.52 (MFZ-KA25/35VA)
Refrigerant pipe [12.7 (MFZ-KA50VA)
(with heat insulator)
Indoor coil
thermistor
RT12 (main)
Flared connection
Flared connection
Refrigerant pipe [6.35
(with heat insulator)
8
MF2
5
4
RT13
1
CN 3
2
112
2
3
RT12
4
1
5
CN
6
RT11
111
CN212
RED
1
2
5
BLK
MF
3
WHT
4
YLW
5
BLU
6
CN211
SYMBOL
RT14 INDOOR COIL THERMISTOR (MAIN 2)
TR15 INDOOR COIL THERMISTOR (MAIN 3)
T11 TRANSFORMER
NAME
Unit : mm