-120-
Caution:
Do not let the drained out refrigerant escape to the outside atmosphere.
• Always be sure to charge with refrigerant from the liquid phase side.(R407C)
(2)
Refrigerant adjustment in cooling season (Flow chart)
PUHY-(P) 400·500 YEM(K,C)-A
Start adjustment
Set all indoor units to test run mode
and start cooling.
Is the liquid level
of the accumulator 0 or 1,
6 minutes or more after
starting?
Use the low-pressure service
port to drain out refrigerant
a little at a time.
Use the low-pressure service
port to charge the refrigerant
a little at a time.
Is TH1 115
°
C ?
After adjusting the refrigerant,
operate for 5 minutes and determine.
Note: 1
Tc – TH5
°
5 C ?
Adjustment finished.
Use the low-pressure service
port to charge the refrigerant
a little at a time.
After adjusting the refrigerant,
operate for 5 minutes and determine.
Use the low-pressure service
port to drain out refrigerant
a little at a time.
Use the low-pressure
service port to charge
the refrigerant a little
at a time.
Use the low-pressure
service port to drain
out refrigerant a little
at a time.
YES
NO
After adjusting refrigerant,
operate for 5 minutes and
determine Tc – TH5.
Has the frequency
stabilized two hours or more
after the power has been turned on
or after 30 minutes of continuous
compressor operation after
the power has been
turned on?
Is TH1
110
°
C ?
Is 5
Tc – TH5
10
°
C ?
Tc – TH7
20
°
C ?
