Specifications
-123-
PUHY-(P) 600·650·700·750 YSMF-C
YES
NO
Start Adjustment
Adjustment completed
Run all the indoor units in the
heating condition in the test
run mode.
Has the operating
condition stabilized?
AL1 = 0
And
AL2 = 0?
Has the operating
condition stabilized?
Has the operating
condition stabilized?
AL1 = 0
And
AL2 = 0?
AL1 = 0
AL1
= 1
AL1 = 2
And
AL2 = 2?
Charge with small amounts
of refrigerant at a time
through the variable
capacity unit's low pressure
service port.
After adjusting the
refrigerant volume,
run for 5 minutes
and judge the AL.
After adjusting the
refrigerant volume,
run for 5 minutes
and judge the AL.
After adjusting the
refrigerant volume,
run for 5 minutes
and judge the AL.
After adjusting the
refrigerant volume,
run for 5 minutes
and judge the AL.
After adjusting the
refrigerant volume,
run for 5 minutes
and judge the AL.
Did the liquid level
change from
AL = 0 to AL =1?
Finish charging with refrigerant.
Determine the difference between the volume of
refrigerant needed for heating and the volume
needed for cooling and charge with that amount.
Turn on self-diagnosis switches (SW1) No. 7 switching to the mode in
which the liquid level is displayed by the LED.
Readjust
Turn all SW1 switches OFF
Does AL1 =2 or
AL2 = 2?
Drain out approximately 5kg
of refrigerant from the AL=2
unit's low-pressure service port.
Does AL1 =2 or
AL2 = 2?
Drain out approximately 5kg
of refrigerant from the AL=2
unit's low-pressure service port.
Drain out approximately 5kg
of refrigerant from the AL=2
unit's low-pressure service port.
The indoor unit operation
capacity is set to middle
capacity.
The indoor unit operation
capacity is set to single-unit
operation.
Adjustment
unnecessary.
Note: 1
Note: 2
Note: 3
Note: 5
Note: 7
Note: 4
Note: 2
Note: 2
Note: 6
1
Go to
Go to
AL1: Variable capacity unit liquid le
vel AL
AL2: Constant capacity unit liquid le
vel AL
* Refrigerant pooling on account of e
xtension-pipe length has a
considerable effect when refrigerant level adjustments are
performed during heating operations. Please recheck operations
during the cooling season.
1
1