Technibel GRV79R5VAA Technical Data & Service Manual page 48

Heating
Room temperature control is obtained by cycling the compressor ON and OFF under control of the room
temperature sensor in the remote control unit.
The room temperature (and other information) is transmitted every 3 minutes by the remote control unit to the
controller in the indoor unit.
More than
5 minutes
T °C
set temp.
T–1 °C
T–2 °C
Compressor
OFF
Outdoor fan
OFF
Indoor fan
OFF
Standby lamp
OFF
Indoor heat exch.
coil temp.
Tc °C
*1
Solenoid coil
OFF
(4 – way valve)
Operation button
OFF
The control circuit will not attempt to turn the compressor ON until the compressor has been OFF for at least 5
minutes. To protect the compressor from stalling out when trying to start against the high side refrigerant
pressure, the control circuit has a built-in automatic time delay to allow the internal pressure to equalize.
As a protective measure, the control circuit switches the compressor OFF after 5 minutes or more of compressor
operation.
Thermo. ON : When the room temperature is below T – 1°C (T°C is set temperature).
Compressor
Thermo. OFF : When the room temperature is equal to or above set temperature T°C.
Compressor
NOTE
*1: Refer to "8-6 Cold Draft Prevention".
Signal from remote control unit
3 minutes 3 minutes 3 minutes 3 minutes 3 minutes 3 minutes
Thermo. Thermo.
ON OFF
5 minutes
ON
ON
30 seconds
Set speed
*1
ON OFF
ON
OFF
Thermo.
ON
5 minutes
OFF
OFF
Max. 10minutes
LL
OFF
ON
ON（Reversing cycle）
ON
44
Thermo.
OFF
Room temp.
ON OFF
ON OFF
30 seconds
Set speed
LL
OFF ON