Toshiba RAS-M18SAH-E - High-Temperature Limit Control; Low-Temperature Limit Control (Cooling Operation)

– 28 –
8-8. High-Temperature Limit Control
8-8-1. Heating Operation (Indoor Unit)
The microprocessor detects the indoor heat exchanger
temperature so as to prevent exceeding the conden-
sate pressure.
Control is performed as shown in Fig. 8-8-1.
8-9. Low-Temperature Limit Control
(Cooling Operation)
The microprocessor detects the indoor heat exchanger
temperature so as to prevent freezing up the indoor
heat exchanger.
Control is performed as shown in Fig. 8-9-1 and 8-9-2.
<RAS-13SKH-E>
Fig. 8-8-1
8-8-2. Cooling, Heating and Dry Operation
(Outdoor Unit)
The microprocessor detects the outdoor heat ex-
changer temperature so as to prevent exceeding the
condensate pressure.
Control is performed as shown in Fig. 8-8-2.
Fig. 8-9-1
< RAS-10SKH-E-1>
60
53
52
(˚C)
Compressor,
Outdoor fan
OFF
ON
* 1 ····· Only outdoor fan is turned off.
* 1
Heat exchanger
temperature
58
51
(˚C)
Outdoor fan
Forced
OFF
Normal
ON
Heat exchanger
temperature
Fig. 8-8-2
Compressor
Less than 2˚C continues
for 5 minutes
OFF
ON
Outdoor fan
6
Heat exchanger
temperature
2
(˚C)
Compressor
Less than 5˚C continues
for 5 minutes
OFF
ON
Outdoor fan
7
Heat exchanger
temperature
5
(˚C)
Fig. 8-9-2