Outdoor Unit
Item
Description of operation, numerical data, and other information
Remarks
1. Pulse
motor valve
(PMV)
control
1.
PMV1 control
1)
During air conditioner operation, the pulse count of a
PMV1 (pulse motor valve 1)
is
controlled between
120
pls
and
3
000
pls
.
2)
During cooling, the PMV opening is controlled on the basis of measurements
provided by the TL temperature sensor and the Pd pressure sensor (
S
ubcool
control).
3)
During heating, the PMV opening is controlled on the basis of measurements
provided by the TS
and T
D
temperature sensors and the PS
pressure sensor
(
S
uperheat control).
4)
PMV are fully closed when the air conditioner is in
thermostat
OFF state or
upon
being turned off normally or shut down due to an abnormality.
2.
PMV4 control
1)
During cooling, the pulse count of a PMV4 (pulse motor valve 4 ) is controlled
between
30
pls and 500pls.
The PMV4 opening is controlled on the basis of measurements provided by the
T
L3
tenperature sensor and PD pressure sensor (
Subcool
control),
or TS3 temperature sensor and PS pressure sensor (
S
uperheat control).
2)
During heating, the
pulse count of a PMV4 is controlled between 0pls and
5
00pls.
The PMV4 opening is controlled on the basis of
measurements
provided
by
the TD1 or TD2.
5
Control
Outline
120
3000
Opening
of
PMV1 (pls)
Minimum
Maximum
PMV1
30
500
O
peni
ng
of PMV
4
dur
ing
cool
ing
(p
ls)
Minimum
Maximum
PMV4
0
5
00
O
peni
ng
of PMV
4
dur
ing
heat
ing (
pls
)
Minimum
Maximum
PMV4
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