Service manual
15
AF-R100CX
AF-R120CX
MICROCOMPUTER CONTROL SYSTEM
Figure Y-1
2. Operation mode
2-1 COOL operation
The compressor turns on or off, at thermostat lines C1
and C2. The fan motor is also controlled with the
compressor.
3. Fan speed
Fan speeds are given by the fan motor, “H”, “M” and
“L”, which are available in the following operation
mode.
Table Y-1
Preset temperature (°C)
States 1 & 3
States 2
: Compressor ON
: Compressor OFF
Room temperature transition
1
3
2
Room temperature (°C)
C1
C2
1. Temperature control characteristic
1-1 COOL operation
In the “COOL” mode, the thermostat circuit is controlled
by two thermostat lines (C1, C2).
Figure Y-2
2-2 FAN ONLY operation
The fan motor always turns on.
Compressor
Fan
ON
OFF
ON
OFF
30 seconds
64 86
62
64
84
86
C2
C1
Preset temperature (°F)
("THERMO" switch)
Room temperature (°F)
4. 12-hours timer
4-1 OFF-TIMER operation
Set the delay timer during operation.
The unit will turn off automatically according to your
setting. Timer duration can be set by 0.5 hours to
maximum 12 hours. Up to 9.5 hours, you can set by 0.5
hours increments and from 10 to 12 hours, by 1 hour
increment.
If you touch button “POWER ON/OFF” during OFF-
TIMER operation, then the unit turns off and OFF-
TIMER operation is cancelled.
4-2 ON-TIMER operation
Set the delay timer when unit is not operating.
The unit will turn on automatically according to your
setting. Timer duration can be set by 0.5 hours to
maximum 12 hours. Up to 9.5 hours, you can set by
0.5 hours increments and from 10 to 12 hours, by 1
hour increment.
If you touch button “POWER ON/OFF” during ON-
TIMER operation, then the unit turns on and ON-TIMER
operation is cancelled.
ON-TIME and OFF-TIME display will count down the
remaining time.
from 0.5 to 9.5 ..... 0.5 hours
from 10 to 12 ....... 1 hour
5. Energy saver
During normal operation, the thermostat automatically
controls cooling and the fan runs continuously whenever
the air conditioner is in operation.
When the ENERGY SAVER is set, the thermostat
automatically controls cooling and the fan automatically
stop when compressor is not operating. (Fan will stop
in 30 seconds after the compressor stops.)
Selector Fan motor
HIGH COOL H
MED COOL M
LOW COOL L
FAN ONLY M
Figure Y-3