Daikin FTX25JVEA9 Service Manual page 319

Troubleshooting - Outdoor Unit Related
3.4.9 Inverter Units Refrigerant System Check
Check No.9
3.4.10 Inverter Units Input Current Measurement
Mount a clamp meter to the red harness indicated by the arrow ( * ), and conduct forced cooling
Check No.10
operation.
In the case of RMX140JVMC
POWER SUPPLY
~50Hz 220-240V
X1M
~60Hz 220-230V
N
FIELD WIRING
L
TO TO BP UNIT
BP 1
X2M
1
1
1
2 2
3 3
BP 2
X3M
2
1 1
2 2
3 3
BP 3
X4M
3
1 1
2 2
3 3
ACN : CONNECTOR
ACP : CONNECTOR
C1R : CAPACITOR
C900~C927 : CAPACITOR
CT900~CT902 : CURRENT TRANSFORMER
F1U : FUSE
FG1~FG3 : PROTECTIVE EARTH
H102~H105 : WIRE HARNESS
H1P~H4P : PILOT LAMP
HPS : HIGH PRESSURE SW
PM : POWER MODULE
L : LIVE
L900~L904 : COIL
L1R , L2R : REACTOR
LED2~LED4 : 7 SEGMENT
M1C : COMPRESSOR MOTOR
M1F , M2F
: FAN MOTOR
N : NEUTRAL
OIS15 : SOLID STATE RELAY
PCB1~PCB4 : PRINTED CIRCUIT BOARD
R250 , R251
: RESISTOR
306
∗
Refrigerant system check
Is
the discharge
thermister disconnected
from the holder?
NO
Is any moisture
found in sight glass.
NO
Is any
refrigerant filter
clogged?
NO
Check for gas leaks.
See the section on insufficient
gas detection.
YES
∗ Cooling Only System
PCB2
S952
Z1C
1
BLK
C926 C905
C925
V900 C900
L900
L903
2
C923 C924 C902
RED
V901
SA900
ACP
L904
GRN
FG1
YLW S908 S907
GRN
FG2
YLW
2 1
1
FG3
GRN
YLW
CT900
ACN
BLK
Z2C
S906
WHT
1
YLW 3
BRN 5
1 3 1
S132 S107
S131 S111
S105 S110
4 1 2
1 3 1 1
M
HPS SP Y1R
Y3E
R1T~R5T : THERMISTOR
EV
P
RY3X , RY84 :
MAGNETIC RELAY
S101~S952 : CONNECTOR
SW1~SW2 : ADDRESS SELLECT SW
SW3 : OPERATION MODE SELLECT SW
PUMP DOWN SW ( DOWN )
SW4 :
SW5 : ( UP )
SW6 : SET SW
SW7 : TEST OPERATION SW
SA900 : SURGE ABSORBER
SP : LOW PRESSURE SENSOR
V900~V901 : VARISTOR
TA5 , TA6 : CONNECTOR
TB2~TB8 : CONNECTOR
X1M~X4M : TERMINAL STRIP
Y1E~Y3E : ELECTRONIC EXPANSION VALVE
Y1R : REVERSING SOLENOID VALVE
Z1C~Z6C : FERRITE CORE
BLK: GRN: PNK:
YLW:
BLU:
GRY: RED:
BRN: ORG:
WHT:
YES
YES
Conduct the check after operating
the equipment for a sufficient length
of time.
YES
S951
L902
2
PCB1
RED
C916 C903
C906
S151
L901
CT901
1
C915 C904
1
N
RED
CT902
L
2
C927
S904
S903
3 1 7 1 4 F1U
3.15A
Z3C
0IS15
3 1 7 1 4
1
S104 S103
S109 S108
5 1 6 1 6
t˚ t˚
M M
R5T R4T R3T
Y2E Y1E
EV EV ( DISCHARGE ) ( OUTDOOR )
L G
( SUCTION )
PCB3
S514 S516
5 3 1 1 S504 5 5 3 1 1 S506
Z4C Z5C
M
M
M1F
3~
3~
(Lower Side) (Upper Side)
Correct the problem.
Conduct vacuum drying.
Clean or replace refrigerant
filter.
Replace the refrigerant.
ACTIVE
PM
H2P
MODULE
~
+
TA5
WHT
RY3X
~
-
TA6
R250
BLU
R251
RY84
H104
N-
BRN
PCB4
BRN
H1P
H105
H102
LED2 LED3 LED4
P+
ORG
ORG
H103
SW1 SW2 SW6
S140
SW3 SW5
1
WHT
SW7 SW4
BLK
BLK
S114
BLK
10
BLK
BLK
6
N
N BRN
U
t˚ t˚ t˚
RED
U U
V
V
R2T R1T
W
W
( CONDENSER )
S101
S102
( LIQUID )
1 2 1 4
5
1 2 1 4
H3P H4P
S501 S502
ASSIGNMENTS OF
TERMINALS OF THE COMP.
N W
M2F
U V
Service Diagnosis
Si18-201
(MF032)
L1R
L2R
WHT WHT
WHT WHT
TB7
TB8 TB6
TB2
Z6C
TB4
TB5
1 6
C1R
N
M1C
+
-
M
3~
W
V
1 S517 3
3D024907B