Mitsubishi Electric PUHY-200YMF-B Service Handbook page 86

Flow Chart (When a high pressure cannot be maintained at 14 kg/cm
Run for 5 minutes after adjusting the refrigerant,
then judge.
Charge with small amounts of
refrigerant at a time through
the low pressure service port.
Run for 5 minutes after adjusting the refrigerant, then judge.
Charge with small amounts of
refrigerant at a time through
the low pressure service port.
Caution: (PUHY-P200·250YMF-B)
Always be sure to charge with refrigerant from the liquid phase side.
Start adjustment.
Run all the indoor units in the cooling
condition in the trial operation mode.
Is the liquid level in the
accumulator 0 or 16 or more
minutes after starting?
Is TH1 115°C?
Has the power
been switched on for 2 hours
or longer, or has the compressor run
continuously for 30 minutes or longer
since the power was switched on,
and has the frequency
stabilized?
Is 7(5) Tc-TH5
12(10) deg.?
Is Tc-TH7 17(15)
deg.?
Is TH1 110°C?
Adjustment completed.
–84–
for PU(H)Y-(P)200·250YMF-B
2 G (1.37MPa) in the intermediate period)
Drain out small amounts of
refrigerant at a time from the
low pressure service port.
Charge with small amounts of
refrigerant at a time through
the low pressure service port.
Is Tc-TH7 < 7(5) deg.?
Charge with small
amounts of refrigerant at
a time through the low
pressure service port.
Note: • Do not let the drained out
• ( ) is for PU(H)Y-
YES
NO
Run for 5 minutes after
adjusting the refrigerant,
then judge Tc - TH5.
Drain out small amounts
of refrigerant at a time
from the low pressure
service port.
refrigerant escape to the
outside atmosphere.
200·250YMF-B