Mitsubishi Electric MXZ-8B140VA, Technical & Service Manual

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18
MXZ-8B140YA MXZ-8B160YA
Power turned on
LED on the controller board display the operation and inspection status as follows.
If LED does not light, it indicates that no power is supplied to the board:
Operation / Inspection Display
Normal status
Faulty status
(blinking)
Details
●
WARNING:When the main supply is turned off, the voltage[540 V]in the main capacitor will drop to 20 V in approx.5 minutes (input voltage : 380 V). when servicing, make sure that LED on the outdoor circuit board goes out,
and then wait for at least 5 minute.
●
Components other than the outdoor board may be faulty : Check and take corrective action, referring to the service manual.
Do not replace the outdoor board without checking.
Cautions when Servicing
Code
(blinks)
Operation status display,
such as C5. H7
F3
F5
F9
E8
E9
EA
Eb
Ec
E0 - E7
EE, EF
Ed
63L connector (red) is open.
63H connector (yellow) is open.
2 connectors (63H/63L) are open.
Branch box/outdoor communication error (Signal receiving error)(Outdoor unit)
Indoor/branch box communication error (Signal receiving error)(Branch box)
Branch box/outdoor communication error (Transmitting error)(Outdoor unit)
Indoor/branch box communication error (Transmitting error)(Branch box)
•Mis-Wiring of indoor-branch box / branch box-outdoor unit connecting wire.
•Too many indoor units / branch box are in the system.
Mis-wiring of indoor-branch box/branch box-outdoor unit connecting wire (converse wiring or disconnection)
Startup time over
Communication error except for outdoor unit
Combination errer, undefined error
Serial communication error
SYMBOL NAME
TB1
MC
MF1, MF2
21S4
SV1,SV2
63L
TH3
TH4
TH6
TH7
CONV.B.
63H
Terminal Block <Power Supply>
TB2
Terminal Block <Branch Box>
Motor for Compressor
Fan Motors
Solenoid Valve <Four-Way Valve>
Solenoid Valve <Bypass Valve>
High Pressure Switch
Low Pressure Switch
Thermistor <Outdoor Pipe>
Thermistor <Compressor>
Thermistor <Outdoor 2 - Phase Pipe>
Thermistor <Outdoor>
ACL1~ACL4
CB1, CB2
CK
RS Reactor
Capacitor
Rush Current Protect Resistor
Main Smoothing Capacitor
Controller Circuit Board
F1 ~ F4
X51,X52,X54,X55
SW1
SW2
SW4
Connection Terminal <Ground>
Controller Circuit Board
Fuse <T6.3AL250V>
Relay
Switch <Forced Defrost, Defect History
Record Reset>
Switch <Self Diagnosis Switch>
Switch <Test Operation>
52C Relay
TB-C1
X52A
Connection Terminal
TB-N1 Connection Terminal
IGBT Power Module
Connection Terminal
TB-P2
P. B. Power Circuit Board
TB-L1/L2/L3 Connection Terminal <L1/L2/L3-Power Supply>
Connection Terminal <U / V / W - Phase> TB-U/V/W
GD1, GD3
N. F.
Noise Filter Circuit Board
LO1/LO2/LO3/NO
Connection Terminal <L1/L2/L3/N-Power Supply>
Connection Terminal <L1/L2/L3/N-Power Supply>
Connection Terminal <L1-Power Supply>
LI1/LI2/LI3/NI
SW5
Switch <Function Switch>
SW6
SW7
SW8
SW9
SS
CN3S
CNIT
Switch <Model Select>
Switch <Function Setup>
Switch <Function Setup>
Switch <Function Setup>
CN31 Connector
LED3 Light Emitting Diode
<Operation Inspection Indicators>
Connector <Connection for Option>
Connector <Connection for Option>
CNDM Connector <Connected for Option
(Contact Input)>
CN51 Connector <Connection for Option>
Connector <Connection for Option>
C. B.
L1-A1 / IN
Connection Terminal <L1-Power Supply> L1-A2 / OU
Connection Terminal <L2-Power Supply> L2-A2 / OU
Connection Terminal <L3-Power Supply> L3-A2 / OU
Connection Terminal <N-Power Supply> N-IN
Connection Terminal <CK>
CK-OU
Details
Code
U2
U7
U1
UL
U6
UF
UH
UP
U3
U4
U5
U8
U9
PA
Compressor temperature fault
Low-discharge superheating fault, Erroneous connection of refrigerant pipes or
the connecting wires
High pressure fault (63H operates)
Low pressure fault (63L operates)
Abnormality of power moduls
Compressor over current shutoff (Start up locked)
Current sensor fault (P. B.)
Compressor overcurrent shutoff fault
Compressor thermistor (TH4) open or short-circuit
Outdoor unit thermistors (TH3, TH6, TH7), 63HS, and branch dox
thermistors open or short-circuit
Radiator panel temperature fault
Abnormality in outdoor fan motor
Voltage fault, current sensor fault
Forced compressor stop
(Overlap malfunction of drain pump in indoor unit
and linear expansion valve in branch box)
MODEL
140Y
SW6
ON
OFF
1 2 3 4 5 6 7 8
160Y ON
OFF
1 2 3 4 5 6 7 8
CY1,CY2 Capacitor
High Pressure Sensor 63HS
MS
3~
MF1
1
3
1
7
CNF1
(WHT)
TRANS
MS
3~
MF2
1
7
CNF2
(WHT)
CNDC
(PNK)
2
4 1 1 2 1 2
TH7/6
(RED)
TH3
(WHT)
TH4
(WHT)
TH7
t° t° t° t°
TH6 TH3 TH4
3 1
63HS
63HS
(WHT)
63L
(RED)
3 1
63L
63H
(YLW)
3 1
63H
1 7
3 1
CNS
(WHT)
2
7
CN2
(WHT)
F3
1 2
1 3 1 3
CNAC
(WHT)
CN4
(WHT)
1
2
3 4
F4
F2
F1
21S4
(GRN)
SV2
(BLU)
X52 X55
21S4 SV2
1 3
SV1
(GRY)
X54
SV1
IGBT
TB-W
TB-V
TB-U
TB-L3
1 3
SS
(WHT)
X51
1 14
CNM
(WHT)
LED3
1
5
CNIT
(RED)
1
5
CN51 (WHT)
1
3
CNDM (WHT)
1
3
CN3S (WHT)
SW8
SW5
SW1
CN31
SW6
SW9
SW2
SW7
SW4
P. B.
7
1
7
CN2
(WHT)
CN7
(WHT)
1
2 2
CN4
(WHT)
1
2
2
2
CN5
(RED)
2
CNCT
(RED)
N. F.
CONV. B.
C. B.
RED
WHT
CNDC
(PNK)
CNL
(BLU)
1 3 1 3
1 1
3
1 3
CNAC2
(RED)
CNAC1
(WHT)
BLK
BLK
ACL4
ACL1
ACL2
ACL3
BLK
GD1
1
3
3
CN7 (WHT)
U
V
W
MC
RED
WHT
RED
RED
RED
RS
X52A
WHT
BLK
BLK
RED
RED RED
WHT
WHT
WHT WHT
BLK
BLK
MS
3~
TB-L2
TB-L1
TB-P2
CB1 CB2 CK
BLK
BRN
GD3
S1
N
L1
L2
L3
S2
S3
BLU
GRN/YLW
YL
W
ORN
WHT
BRN
RED
BRANCH
BOX
TB1
TB2
POWER
SUPPLY
3N
~
380/400/415V
50H
Z
is the switch position.
RED RED
BLK
BLU
BLU
1 3
3
TB-C1 TB-N1
L3-OU
BLK
L3-A2 L2-OU L2-A2
L1-A1
LO1 LI1
LO2 LI2
LO3 LI3
NO NI
L1-IN
N-IN
L1-OU
CK-OU
L1-A2
2
CY1 CY2
+ 1
is the switch position.
+
1 MODEL SELECT
OCH480A