4-2. Heating fan control
1) An outdoor fan is controlled by TE sensor, TO sensor and compressor frequency. (It is controlled with W1
for minimum and the maximum is controlled according to the following table.)
2) At the start time, the fan is fixed for 3 minutes only with the maximum fan tap corresponded to the zone
in the following table but it is controlled with TE sensor temperature after then.
3) When a status TE
≥
24°C continues for 5 minutes, the operation stops. In this case, no error display
appears and the status is same as the normal thermo-OFF. The can restarts after approx. 2 minutes 30
seconds and this continuous operation is not an error.
4) When the above status as 3) occurs frequently, it is considered that filter of the suction part of the indoor
unit is dirty. Clean the filter and restart the operation.
– 2 tap / 20 seconds (up to W1)
Stop timer count
– 2 tap / 20 seconds (up to W1)
– 1 tap / 20 seconds (up to W1)
Rotational frequency hold
+
1 tap / 20 seconds
(up to Max. tap of each zone)
TE
21˚C
18˚C
15˚C
24˚C
Temp.
range
SM110
SM140
20.4 Hz or lower 20.4Hz to 45.0Hz 45.0Hz or higher
Max.
Max.
Max.
10°C
≤
TO
W7
W8
W9
5°C
≤
TO < 10°C
W9
WB
WE
-3°C
≤
TO < 5°C
WE
WE
WE
-10°C
≤
TO < -3°C
WE
WE
WE
TO < –10°C
WE
WE
WE
TO error
WE
WE
WE
5. Coil heating control
1) This control function heats the compressor by turning on the stopped compressor instead of a case heater.
It purposes to prevent stagnation of the refrigerant inside of the compressor.
2) As usual, turn on power of the compressor for the specified time before a test run after installation;
otherwise a trouble of the compressor may be caused.
As same as a test run, it is recommended to turn on power of the compressor beforehand when starting
operation after power of the compressor has been interrupted and left as it is for a long time.
3) A judgment for electricity is performed by TD and TO sensors.
If TO sensor is defective, a backup control is automatically performed by TE sensor.
For a case of defective TO sensor, judge it with outdoor LED display.
4) For every model, the power is turned off when TD is 30°C or more.
Intermittent power-ON
10 minutes: ON /
5 minutes: OFF
Continuous power-ON
No power
)
e
m
i
t
l
a
m
r
o
N
(
TO
-3
˚C
-4
˚C
-5
˚C
-2
˚C
s
Power-ON
condition
TD<30˚C
- 38 -
FILE NO. SVM-17005
