Mitsubishi Electric PAC-AK31BC, Техническое и сервисное руководство

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23
MXZ-8A140VA
3
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
• W
A
RNING:When the main supply is turned of
f, the voltage[340 V]in the main capacitor will drop to 20 V in approx.2 minut
es
(input voltage : 240 V). When servicing, make sure that LED on the outdoor circuit board goes out, and then wait for at least 1 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 U2 U7 U1 UL U6 UF UH UP U3 U4 U5 U8 U9 PA
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 (T
ransmitting error)(Outdoor unit)
Indoor/branch box communication error (T
ransmitting error)(Branch box)
· Miswiring of indoor-branch box / branch box-outdoor unit connecting wire. · T
oo many indoor units / branch box are in the system.
Miswiring 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 Discharge 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 modules Compressor over current shutof
f (Start up locked)
Current sensor fault (P
. B.)
Compressor overcurrent shutof
f fault
Discharge pipe/compressor thermistor (TH4) open or short-circuit Outdoor unit thermistors (TH3,
TH6,
TH7, and
TH8), 63HS, and branch dox
thermistors open or short-circuit Heatsink temperature fault Abnormality in outdoor fan motor V
oltage fault, current sensor fault (N. F
.)
Forced compressor stop (Overlap malfunction of drain pump in indoor unit and linear expansion valve in branch box)
SYMBOL
SYMBOL
SYMBOL
NAME
NAME
NAME
TB1 MC MF1, MF2 21S4 SV1,SV2 63HS 63L TH3 TH4 TH6 TH7 TH8 DCL
52C
ACTM CB
P.
B
.
63H
Te
rminal Block
(Power Supply
, Branch Box)
Motor for Compressor Fan Motors Solenoid V
alve (Four-W
ay V
alve)
Solenoid V
alve (Bypass V
alve )
High Pressure Sensor High Pressure Switch Low Pressure Switch Thermistor(Outdoor Pipe) Thermistor(Discharge) Thermistor(Outdoor 2 - Phase Pipe) Thermistor(Outdoor) Thermistor(Radiator Panel) Reactor
52C Relay
Active Filter Module Main Smoothing Capacitor
Power Circuit Board
TA
B
S
/
T
TA
B
P
1/
P
2/
P
TA
BN1/N2/N
DS2, DS3 IPM LI / LO NI / NO EI, E2
F1
~
F4
X51
~
X55
SW1 SW2 SW4
Connection
Te
rminal (L
/ N - Phase)
Connection
Te
rminal (DC V
oltage)
Connection
Te
rminal (DC V
oltage)
Diode Bridge Power Module Noise Filter Circuit Board Connection
Te
rminal (L
- Phase)
Connection
Te
rminal (N - Phase)
Connection T
erminal
(Ground)
Controller Circuit Board
Fuse (T6.3AL250V) Relay
Switch (Forced Defrost, Defect History Record Reset) Switch (Self Diagnosis Switch) Switch (T
est Operation )
Connection
Te
rminal(U / V / W - Phase)
TA
BU / V / W
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
LED
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)
N. F
.
C. B.
MODEL
MXZ-8A140V
A
SW6
ON OFF
12345678
MS 3~
MF1
1
3 1 7
CNF1 (WHT)
TRANS
MS 3~
MF2
17
CNF2 (WHT)
CNDC (PNK)
2
4
11
2
2
1
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 (YL
W)
3
1
63H
17
31
CNS (WHT)
2
7
CN2 (WHT)
F3
12
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 (GR
Y
)
X54
SV1
1
3
SS
(WHT)
X51
11
4
CNM (WHT)
LED1
12
2
CN52C (RED)
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 1 2 1 2 1 2 7 6
2 2
TA
B
N
TA
B
P
CN2 (WHT)
4
1
CNAF (WHT)
CN4 (WHT) CN5 (RED) CN3 (WHT)
TH8
t°
WHT
RED
CB
C. B.
N. F
.
BLU
S1
N
L
S2
S3
YLW
ORN
GRN / YL W
BRN
RED
TB1
NO FUSE BREAKER 40 A
BRANCH BOX
POWER SUPPL
Y
~/N 220/230/240V 50Hz 220V 60Hz
DCL
ACTM
L1
L2
N2
Io
N1
P
4
16
RED BLK
BLK
RED WHT
WHT
IPM
TAB V
TAB W
TABN1
BLK
TAB N2
TAB U
TAB P2
U
V
W
MC
RED
RED
WHT
WHT
BLK
MS 3~
1
3
2
CNDC (PNK)
U
DS2 DS3
TA
B
S
TA
B
P
1
TA
B
T
RED
BLU
WHT
WHT
LO
52C
NO
LI
NI
CN5
(RED)
CNAC2
(RED)
CNAC1
(WHT)
CN52C
(BLK)
2
2
1
3
E2
EI
U
U
1
2
1 2
3 1
BLU
The black square (
■
) indicates a switch position.