MITSUBISHI ELECTRIC P500YMF-C User Manual

Page 65

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Refrigerant adjustment in Cooling season (Flow chart)

In case of PURY-P400, 500YMF-C

YES

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?

TH1

≤

115˚C?

Are all indoor
units SHs more
than 6deg?

Is the LEV opening

degree stable when SH

< 6deg?

Is the

thermostat turned

on/off in order for the indoor

unit to prevent from

frosting?

Adjustment completed.

*Operate for 5 minutes after adjusting the refrigerant and make a judgement.

Fill refrigerant little by little from the
low-pressure side service port.

Stop the refrigerant volume adjustment
and retrieve the refrigerant. After
evacuating air, fill the specified volume
of refrigerant.

Retrieve the 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.

5deg

≤

SC11?

≤

SC16

≤

30deg?

30deg < SC16?

TH1

≤

110˚C?

Fill refrigerant little by little from the
low-pressure side service port.

*Operate for 5 minutes after adjusting the refrigerant and make a judgement.

Fill refrigerant little by little from the
low-pressure side service port.

*Operate for 5 minutes after adjusting the refrigerant and make a judgement.

Note 2

Note 3

Note 2) SC11 : Liquid refrigerant sub-cool for BC controller inlet

Note 3) SC16 : Liquid refrigerant sub-cool for BC controller outlet