(ii) Pulse input
When Jumper wire J1 on the PCB of indoor unit
is cut at the field or “PULSE INPUT” is selected in the wired remote
control’s indoor unit settings.
Input signal to CnT becomes valid at OFF
→
ON only and the motion of air-conditioner [ON/OFF] is inverted.
CnT input
Unit
(Case A)
Unit
(Case B)
OFF
OFF
ON
ON
OFF
ON
OFF
ON
ON
OFF
OFF
(19) Hot keep operation
If the hot keep operation is selected during the heating operation, the indoor fan is controlled based on the temperature of the
indoor heat exchanger (Th2) to prevent blowing of cool wind.
However, if the fan speed setting is HI and room temperature is 19°C or higher, this control is not executed.
(20) Frost prevention control
(a) Operating conditions
(b) Detail of anti-frost operation
(c) Reset condition
Indoor heat exchanger
temperature (ºC)
2.5
8
Operation mode
Item
Protective control
Reset
Compressor operation
Indoor fan
Forced outage
Operation instruction
Depends on operation mode
2.5
(i)
Reset
Protective
control
8
(ii)
(21) Heating high pressure control
(a) Start condition
When the indoor heat exchanger temperature (Th2) has become higher than the start temperature for 1 minute continuously.
(b) Contents of control:
Compressor stop
(c) Release condition
When the indoor heat exchanger temperature (Th2) has become lower than the release temperature.
Item
Room
temperature (Th1)
Release temperature
Start temperature
Th1 <= 24°C
48.5°C
62°C
24°C < Th1<=27°C
47.5°C
61°C
27°C < Th1
46.5°C
60°C
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148
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'16 • SCM-T-199
