2
2
2-4-1-2
2-4. Outdoor Units
2-4-1-1. CHECKS AFTER INSTALLATION HAVE COMPLETED
Is there a short circuit with the intake air flow?
Is the insulation secure? (Refrigerant piping)
Are there any errors with the wiring?
Are the terminal screws loose? Tightening torque (Unit: N•m {k
g
f•cm})
M4...1.57~1.96 {16~20}, M5...1.96~2.45 {20~25}
Is the drain water flowing smoothly?
Is the insulation material properly installed?
Is the earth wire securely connected?
Are the terminal board cover, control board cover and the indoor unit air conditioner firmly fixed and was the installation
completed without any leakage from the refrigerant?
Are the indoor and outdoor units secured firmly installed with bolts at secured locations?
User inspection places
Serviceman inspection
places
2-4-1-2. REGARDING DELIVERY TO THE CUSTOMER
Request the customer to review the operating instructions and explain the operating method for the product.
In addition, it is also recommended that regular inspection checks are agreed upon for maintenance.
Refer to the installation instruction manual provided with the indoor unit for the specifications on the indoor unit installati
on.
Check the following items after completing installation.
• Grill cleaning
• Exterior cleaning
•
Check the operating status
•
Clean the drain pan or things related to the water discharge
• Heat exchanger cleaning
Note : In the case that inter-unit wiring is 30m or longer, you cannot
pump-down.
(lt may trigger the operation of the overload protection device.)
In this case, perform Pump-Down with Pump-Down device.
If you do not stop the compressor operation, and if the valve is open and remove the
refrigerant pipes, the air may be sucked into the system and causes extreme high
temperature in the refrigerant cycle. This may result in rupture or injury, etc.
CAUTION
This outdoor unit cannot collect more than the rated refrigerant
amount as shown by the nameplate on the back.
If the amount of refrigerant is more than that recommended,
do not conduct a Pump-Down.
In this case use another refrigerant collecting system.
Pay a special attention on the rotating of the fan while operating.
Caution in the Pump-Down operation, stop the compressor before removing the
refrigerant pipes.
2-4-1-3. Caution for Pump-Down
1
Stop operation of the unit (cooling, heating etc.).
2 Connect the pressure gauge to the service port of the gas wiring valve.
3 Short-circuit CN-S continously between 1 second and seconds, Pump-Down begins and the unit starts operating.
4 Fully close the liquid side valve 2-3 minutes later.
The Pump-Down will begin.
5 When the pressure gauge drops to 0.1-0.2MPa, close the gas side valve tight and short-circuit the CN-S in again.
Pump-Down operation completed.
Control stop condition
-600 seconds after the Pump-Down operation starts
CN-S
Pump down means refrigerant gas in the system is returned to the outdoor unit.
Pump down is used when the unit is to be moved, or before servicing the refrigerant circuit.
(1) Remove the top panel
by unfastening five screws.
(1) To remove the electrical
component box cover,
press the latches on the
cover in the direction of the
arrow while holding the
handle with one hand.
How to perform Pump-Down (Refrigerant recovery) properly
Screws (× 5)
Electrical component box cover
Latches
Handle
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