Toshiba RAV-104SBH-PE Service Manual page 93

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Correcting temperature
compensation
Tel: 01823 665660
7. OUTLINE OF CONTROL CIRCUIT
2-3 Auto Mode Cooling
When the temperature at the TA sensor rises to a value
˚
over TSC (Ts +1 C) the compressor starts. The unit
operates in cooling until the TA sensor detects a value
˚
equal to TS –0.5 C. At this point, the compressor
operation stops if compressor run time is greater than
5 minutes otherwise the compressor will continue until
the 5 minutes run time has elapsed. If auto fan speed
has been selected, the fan will run in Low speed. If the
temperature rises above TSC, the compressor will start
again. If the temperature falls and remains below
˚
Ts -1.5 C for over ten minutes, then the system will
enter Heating Mode.
Auto Mode Heating
When the temperature sensed at TA falls to a value
˚
under TSH (TS -1 C) the compressor will start. The
unit operates in heating until the TA sensor detects a
value equal to TS. At this point, the compressor
operation stops. The indoor fan speed reverts to ultra
low. If the temperature falls below TSH, the
compressor will start again. If the temperature rises and
˚
remains above Ts +1.5 C for over ten minutes, then the
system will enter Cooling Mode.
TIME
+1.5 O C
Tdif = 0.5 O C
Tsc +1 O C
Ts
5min
Tsh -1 O C
-1.5 O C
10min
ROOM TEMPERATURE (TA)
COOLING
FAN OPERATING UNDER COOLING
2-4 Room temperature controlled in the heating
operation can be corrected by dip switch SW03 on
indoor PCB.
Dip Switch BIT 1
setting BIT 2
Control temperature
compensation
This can be used where the air conditioner is located
in a high ceiling.
* Factory Default
93
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10min
CHANGES TO COOLING
COOLING ON
HEATING ON
Tdif = 0.5 O C
CHANGES TO HEATING
HEATING
FAN OPERATING UNDER HEATING
ON ON OFF OFF
ON OFF ON OFF
0 deg 2 deg* 4 deg 6 deg
Fax: 01823 665807
TA: Room
Temperature
TS: Set Temperature