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7
In order to protect the environment, be sure to pump down when relocating or disposing of the unit.
1) Remove the valve cap from liquid stop valve and gas stop valve.
2) Carry out forced cooling operation.
3) After five to ten minutes, close the liquid stop valve with a hexagonal wrench.
4) After two to three minutes, close the gas stop valve and stop forced cooling operation.
5) Attach the valve cap once procedures are complete.
Forced cooling operation
Using the indoor unit ON/OFF switch
Press the indoor unit ON/OFF switch for at least 5 seconds. (The operation will start.)
• Forced cooling operation will stop automatically after around 15 minutes.
To stop the operation, press the indoor unit ON/OFF switch.
C AUTION
After closing the liquid stop valve, close the gas stop valve within 3 minutes, then stop the forced cooling operation.
To pump down
DANGER: RISK OF EXPLOSION
Pump down - Refrigerant leakage. If you want to pump down the system, and there is a leakage in the refrigerant circuit:
• Do NOT use the unitʼs automatic pump down function, with which you can collect all refrigerant from the system into the
outdoor unit. Possible consequence: Self-combustion and explosion of the compressor because of air going into the
operating compressor.
• Use a separate recovery system so that the unitʼs compressor does NOT have to operate.
NOTICE
During pump down operation, stop the compressor before removing the refrigerant piping. If the compressor is still running
and the stop valve is open during pump down, air will be sucked into the system. Compressor breakdown or damage to the
system can result due to abnormal pressure in the refrigerant cycle.
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WARNING
• Do not use tapped wires, extension cords, or starburst connections, as they may cause overheating, electric shock, or fire.
• Do not use locally purchased electrical parts inside the product. (Do not branch the power for the drain pump, etc., from the
terminal block.) Doing so may cause electric shock or fire.
• Be sure to install a ground fault circuit interrupter. (One that can handle higher harmonics.)
(This unit uses an inverter. Therefore, a ground fault circuit interrupter capable of handling higher harmonics must be used in
order to prevent the ground fault circuit interrupter malfunctioning.)
• Use an all-pole disconnection type circuit breaker with at least 3mm (1/8 inch) between the contact point gaps.
• When carrying out wiring, take care not to pull at the conduit.
• Do not connect the power wire to the indoor unit. Doing so may cause electric shock or fire.
• Do not turn on the circuit breaker until all work is completed.
1) Strip the insulation from the wire 3/4" (20mm).
2) Connect the inter-unit wires between the indoor and outdoor units so that the terminal numbers match. Tighten the terminal
screws securely. It is recommended that a flathead screwdriver be used to tighten the screws.
The screws are packed with the terminal block.
Recommend using AWG14,
stranded and insulated wire
for connections between
indoor and outdoor units.
Local code always
supersedes recommendation.
To Room B
1
2
3
Outdoor Unit
To Room A
Power supply
terminal block
1
2
3
Shape wires so
L1
that the service
lid fit securely.
L2
PUMP DOWN OPERATION
WIRING
Room B
Indoor unit B
1 2 3
1 2 3
Outdoor Unit
Safety devices in
accordance with
local and national
Power supply 60Hz
codes, i.e. a
circuit breaker
208-230V
2MX18
15A
1-15
Liquid stop valve
Gas stop valve
Service port
Firmly fix the wires with the terminal screws
Room A
1
2 3
L1 L2
GR
Ground
Note: Take care to ensure that all wiring between indoor
unit and outdoor unit has a consistent connection. Any
splices can cause communication errors.
Hexagonal
wrench
Close
Valve lid
Indoor unit A
1 2 3
Recommend using AWG14,
stranded and insulated wire
for connections between
indoor and outdoor units.
Local code always
supersedes recommendation.
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