Mitsubishi Electric CITY MULTI PQRY-P200YMF-B Service Handbook page 71

3 Check the refrigerant volume by self-diagnosis using the LED.
Set the self-diagnosis switch (SW1) as shown below and check the past information (history) concerning the
refrigerant volume.
Set SW1 as shown in he figure at right.
If LD8 lights up, it indicates the refrigerant charge abnormal delay state just before emergency stop due to refriger-
ant overcharge (1500).
4 Additional refrigerant charge volume
At the time of shipping from the factory, the heat source unit is charged with the amount of coolant shown in the
following table, but since no extension piping is included, please carry out additional charging on-site.
Heat source unit model name
Refrigerant charge volume
Calculation formula
Calculate the additional refrigerant volume by calculating the size of the extension liquid piping and its length (units: m).
Additional refrigerant volume
In the calculation results, round up fractions smaller than 0.01 kg. (Example: 18.54 kg → 18.6 kg)
(α Calculation Table)
Total capacity of
Connected indoor units
P200
100~160
161~300
Caution :
When charging with refrigerant, be sure to charge from the liquid side. If charging from the gas side, it will
cause the refrigerant composition to change inside the unit and the composition of the refrigerant remaining in
the canister will also change.
1 2 3 4 5 6 7 8 9 10
ON
PQRY-P200YMF-B PQRY-P250YMF-B
7.5kg
(kg) = (0.12 × L
α
P250
125~160 1.5
161~375 2.0
8.5 kg
) + (0.06 × L ) + (0.024 × L
1 2
L : Length of ø12.7 liquid pipe (m)
1
L : Length of ø9.52 liquid pipe (m)
2
L : Length of ø6.35 liquid pipe (m)
3
α:
refer to the calculation table.
–68–
) + α
3