5
I
NTERNAL
WIRING
-
PARTS
TABLE
Refer to the wiring diagram on the unit.
The abbreviations used are listed below.
Note
Use copper conductors only.
Do not operate the unit by short-circuiting S1LP.
:Field wiring
L
:Live
N
:Neutral
:Terminal
:Connector
:Wire clamp
:Protective earth (Screw)
BLK
:Black
BLU
:Blue
RED
:Red
WHT
:White
YLW
:Yellow
A1P, A2P ........ Printed circuit board
BS1 ................. Push button (Forced defrost - Pump down)
C1R,C2R ......... Capacitor (M1F-M2F)
DS1 ................ Selector switch (Defrost)
F1C ................. Over-current relay
F1U, F2U ......... Fuse (250V, 10A)
F3U ................. Field fuse
HAP ................ Light emitting diode (Service monitor - GREEN)
H1P, H2P ........ Light emitting diode (Service monitor - RED)
J1HC ............... Cranckcase heater
K1M ................ Magnetic contactor (M1C)
L1 ................... Red
L2 ................... White
L3 ................... Black
M1C ................ Motor (Compressor)
M1F, M2F ....... Motor (Fan)
N ..................... Blue
PRC ................ Phase reverse circuit
Q1L, Q2L, Q3L Thermo switch (M1F-M2F-M1C)
Q3E ................. Earth leak detector
R1T ................. Thermistor (Air)
R2T ................. Thermistor (Coil)
RC .................. Signal receiver circuit
RyC ................. Magnetic relay (K1M)
RyF1~2 ........... Magnetic relay (M1F-M2F)
RyS ................. Magnetic relay (Y1R)
S1LP ............... Pressure switch (Low)
S1PH .............. Pressure switch (High)
S2PH .............. Pressure switch (High-control)
SD .................. Safety devices input
SS1 ................. Selector switch (Emergency)
T1R ................. Transformer (220-240V/16V)
TC ................... Signal transmission circuit
X1M ................ Terminal strip
Y1R ................ 4 way valve
W
IRING
OF
POWER
SUPPLY
AND
THE
UNITS
Refer to the installation manual supplied with the indoor unit for
wiring of indoor units.
Install an earth leak detector and fuse in the power supply line.
P
AIR
SYSTEM
(R
EFER
TO
FIGURE
6)
1. Outdoor unit
2. Indoor unit
3. Earth leak detector
4. Fuse
5. Remote controller
S
IMULTANEOUS
OPERATION
SYSTEM
(R
EFER
TO
FIGURE
7)
1. Outdoor unit
2. Indoor unit (Master)
3. Indoor unit (Slave)
4. Earth leak detector
5. Fuse
6. Remote controller
T
EST
OPERATION
For the test run procedure, refer to the indoor unit installation
manual.
P
UMP
-
DOWN
OPERATION
The outdoor unit is equipped with a low-pressure switch to protect
the compressor. Take the following steps to perform the pumping-
down operation.
Caution
Never short-circuit the low-pressure switch in this operation.
1. Start the fan operation with the remote controller.
Confirm that stop valves both on the liquid and gas side are open.
2. Push the pumping-down button on the PC board of the
outdoor unit.
Compressor and outdoor fan will start operation automatically.
3. Continue operation for 1 min. until operation condition stabilizes.
4. Close the stop valve on the liquid side securely.
Insecure closing of the valve may result in burning of the
compressor.
5. When the low-pressure switch is activated, the unit stops
working. At this time, close the stop valve on the gas side.
This is the end of pumping-down operation. After pumping-down
operation, the remote controller shows “U4” even when ON button
on the remote controller is pressed, and it will not operate. Turn off
the main power supply switch and turn it on again in need of
operation.
D
ISPOSAL
REQUIREMENTS
Dismantling of the unit, treatment of the refrigerant, oil and eventual
other parts, should be done in accordance with the relevant local
and national regulations.
