Fujitsu AO17A Service Instructions Manual page 13

2. AO20R / 24R / 32R (2-ROOM, 4-ROOM)
[Compressor] OFF
[Fan motor] OFF
NO
[Expansion valve]
number of pulses
change 400
1
NO
[4-way valve]
switching (OFF)
NO
[Expansion valve]
number of pulses
change
2
NO
[Compressor] ON
OUTDOOR
heat exchanger
temperature : T
C
at T = -12°C
C
Defrosting start
3 secs mask
YES
1 25 secs mask start shall be the
start of change (expansion valve
25 secs mask
drive start) of [expansion valve]
number of pulses change.
YES
3 secs mask
YES
The number of pulses conforms
to Appendix Table 1.
2 3 secs mask start shall be the
start of change (expansion valve
3 secs mask
drive start) of [expansion valve]
number of pulses change.
YES
A
Defrosting
end condition
established?
T
C
[Compressor] OFF
3 secs mask
NO
[Expansion valve]
number of pulses
change 400
1
25 secs mask
NO
[4-way valve]
switching (ON)
3 secs mask
NO
Make [expansion
valve] number of
pulses (4)(B).
Hereafter conforms
to normal
operation.
(Defrosting end)
– 12 –
A
=12°C or
15 min
YES
YES
YES