Mitsubishi Electric PUHY-200YMF-C Service Handbook page 79

In case of PUHY-200, 250YMF-C
Adjustment starts.
Start cooling operation of all indoor
units in a test run mode. Note 1
Has the
compressor been
operated for more than
30min?
Was the operation
condition stabilized?
The high pressure
> 13kg/cm2G?
*Operate for 5 minutes after adjusting the refrigerant and make a judgement.
TH1 ≤ 115˚C?
3 ≤ TH8-TH2 ≤ 13deg?
Are all indoor
units SHs more
than 2deg?
Is the LEV opening
degree stable when SH
3deg ≤ Tc-TH5 ≤ 10deg?
Tc-TH5 < 3deg?
Tc-TH7 > 15deg?
TH1-Tc > 25deg?
TH1 ≤ 110˚C?
Adjustment completed.
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. (PUHY-P200·250YMF-C)
Fill refrigerant little by little from the
low-pressure side service port.
< 2deg?
*Operate for 5 minutes after adjusting the refrigerant and make a judgement.
Fill refrigerant little by little from the
low-pressure side service port.
Fill refrigerant little by little from the
low-pressure side service port.
Retrieve the refrigerant little by little
from the low-pressure side service
port.
Fill refrigerant little by little from the
low-pressure side service port.
Note 1) As the refrigerant volume can not be adjusted in the heating mode,
retrieve the refrigerant, evacuate air and then fill the specified
volume of refrigerant if it is necessary to adjust the refrigerant
volume in the winter season.
Stop the refrigerant volume adjustment
and retrieve the refrigerant. After
evacuating air, fill the specified volume of
refrigerant.
TH8-TH2>13deg?
Fill refrigerant little by little from the
low-pressure side service port.
Retrieve the refrigerant little by little
from the low-pressure side service
port.
*Operate for 5 minutes after adjusting the
refrigerant and make a judgement.
*Operate for 5 minutes after adjusting the
refrigerant and make a judgement.
*Operate for 5 minutes after adjusting the
refrigerant and make a judgement.
–78–
for PU(H)Y-(P)200·250YMF-C
YES
NO
Is the
thermostat turned
on/off in order for the indoor
unit to prevent from
frosting?
*Operate for 5
minutes after
adjusting the
refrigerant
and make a
judgement.