46
Installation and Maintenance
Service Manual
4) Additional Refrigerant Charge Record
Table 10 Indoor Unit
No.
Indoor Unit Model
Additional Refrigerant Charge(kg)
1
2
……
N
Total
Table 11 Refrigerant Pipe
Diameter
Total Length(m)
Additional Refrigerant Charge(kg)
Φ15.9
Φ12.7
Φ9.52
Φ6.35
Total
c. Items to be checked after the Installation
Table 12
Items to be Checked
Possible Errors
Check
Results
Has each part and component of the unit been
installed securely?
The unit may fall off, vibrate or generate
noise.
Has the gas leakage test been taken?
The cooling (heating) capacity may be poor.
Dews and water drops may be generated.
Does the drainage go well?
Dews and water drops may be generated.
Is the actual power voltage in line with the value
marked on the nameplate?
The unit may break down or some components
may be burnt out.
Are the wiring and the piping correct?
The unit may break down or some components
may be burnt out.
Has the unit been earthed reliably?
There may be a danger of electric shock.
Does the wire meet the regulated requirement?
The unit may break down or the component may
be burnt out.
Is there any obstacle at the air inlet/outlet of the
indoor/outdoor unit?
The cooling (heating) capacity may be poor
Have the length of the refrigerant pipe and the
refrigerant charge been recorded?
It may be hard to know the exact refrigerant
charge.
d.Trial Running
1) Check before the Trial Running
ķ
Check if the appearance of the unit and the piping system are damaged during the transportation.
ĸ
Check if the wiring terminals of the electronic component are secure.
Ĺ
Check if the rotation direction of the fan motor is right.
ĺ
Check if all valves in the system are fully opened.
2) Trial Running
ķ
The trial running should be carried out by the professionally skilled personnel on the premise that all items listed above
are in normal conditions.
ĸ
Let the unit energized and switch the wired controller or the remoter controller to “ON”.
Ĺ
The fan motor and compressor of the outdoor unit will run automatically in one minute.
ĺ
If there is some unusual sound after the compressor is started, turn off the unit for an immediate check.
