Pump Out Operation - Samsung AM080FX A Series Service Manual

Troubleshooting
4-4 Case study for trouble shoots (cont.)

4-4-3 Pump out operation

Operation for the repair of the Individual outdoor unit,
The operator need to close liquid service valve and the gas service valve manually.
1. Observe low pressure using View Mode of K4 button if compressor operate.
- If low pressure goes down below about
Caution
: Immediately close the gas side service valve, then shut down the Pump Out operation
(Pump out operation shut down : K1 button once more press or K3 button one time press)
- If operation of low pressure goes down below
: Pump down operation will be
2. After pump out about 1kg of refrigerant will be remained in the pipe so use pipe cutter to detach the pipe.
(Do not use flame to detach the pipe)
Outdoor unit
Key number
Push time
How to lnitiate
Compressor
Indoor Unit
4Wasy Valve
Outdoor Fan
Main EEV
Maximum Operation Time
Protection Contol
Etc.
Samsung Electronics
refrigerant emissions to the indoor part.
0.2MPa.g
stopped automatically
Main Sub1 Sub2
K1
3 4 5
K1 Tact Swithc 3 times~6 times
60Hz
Whole Operation (The set temperature=40
ON (Heating Mode)
Maximum air flow
Operation side : 700Step, Stop side : 0Step
10 minutes
Conduct the discharge temperature, high pressure control.
(Low pressure protection control is not carried out)
※Low pressure is outside normal limite : Operation is shut down after as pipe manually closed.
Entry after safety start.
(Only the corresponding Outdoor Unit operation.)
To pump out more than 2 : Except communicatio between Outdoor unit of relevant set after
working for one, remainder set makes Pump Out add.
0.1MPa.g
to protect the compressor.
Sub3
6
o
C)
K1 button
227