Fujitsu AirStage AB12, Service Manual

Page: 69 / 199

An example for COOLING TEMPERATURE CONTROL time chart (Manual setting)
• Set temperature (Ts=T
α
Correction)
• Compressor
• Indoor fan
ON
OFF
ON
OFF
T
α
+0.5 C
(b)
(C)
3~6 min.
3ST
3HT 3HT 3HT 3HT
Less than 6 min.
T
R
TIME
(b)
(a)
T
α
C
(1) When using the cooling mode, set the temperature to a value lower than the current room temperature.
(2) If it is set higher than the current room temperature the unit will not enter the cooling mode and only the fan will oper-
ate.
(a) Compressor turned OFF : T
R
T
α
(b) Compressor turned ON : T
R
T
α
+0.5 C (In case of 3 to 6 minutes)
(c) Compressor turned ON : T
R
T
α
(In case that the compressor stops more than 6 minutes)
6-3-3 “COOL” POSITION
6-3-4 “HEAT” POSITION
(1) Set the temperature higher than the current room temperature. If it is set to a lower temperature, heating will not
start.
(2) For about 3 ~ 5 minutes after the start of heating, the fan will operate very slowly, and then switch to the selected fan
setting. This period allows the indoor unit’s heat exchanger to warm-up before emitting warm air.
(3) During defrosting, the OPERATION indicator lamp flashes 3 sec. ON and 1 sec. OFF, and the heating mode will be
temporarily interrupted.
An example for HEATING TEMPERATURE CONTROL time chart (Manual setting)
• Set temperature (Ts=T β Correction)
• Compressor
• Indoor fan
• speed mode
ON
OFF
SET
S-LOW
OFF
T
β
+0.5 C
(b)
(C)
3~6 min.
3ST 3HT
3HT
20sec.
20sec. 20sec.
20sec.
Less than 6 min.
T
R
Cold air prevention
(a)
T
β
C
27 C
(a) Compressor OFF : T
R
T
β
+0.5 C
(b) Compressor ON : T
R
T
β
(c) Compressor ON : T
R
T
β
+0.5 C (When the compressor stops after less than 6min.)
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