Expansion Valve Control; Snow Falling Protection Fan Mode; Other Control - Fujitsu Airstage V-II Service Manual

2-3-4

Snow Falling Protection Fan Mode

The fan rotates compulsorily at the maximum speed when the outdoor temperature becomes 5
when snow falling protection fan mode is set on.
The fan is rotated for 1 minute at the fan step upper limit at the interval set by PUSH SW.
This mode ends when the outdoor temperature becomes 7
(Operation contents)
Interval setting
setting
setting
setting
setting
1 min
Max
fan step
2-3-5

Other Control

To accurately detect the outside air temperature, the fan is operated while the outdoor unit is stopped.

2-4 EXPANSION VALVE CONTROL

Initialization
conditions
EEV 1
When power
turned on
When operation
stopped
EEV 2
< Cooling mode >
0 pulses basically.
< Heating mode >
EEV is controlled so that the system reaches closer to the target discharge temperature that is calculated from
high and low pressure.
PUSH SW setting
( F2 - 23 )
(standard)
1 min
Int
Operation mode
Cooling
Heating
Cooling
Heating
Interval time Int (min)
00
01
02
03
1 min
Int Int
Control range
operation
0 pulses
55 - 500 pulses
55 - 500 pulses
02-09
or more or operation starts.
30
5
10
20
1 min
Time
stop
0 pulses
0 pulses
or less