Sinclair SDV 6 Service Manual page 51

6.6 Operation mode control

Outdoor Unit is Heat Pump
①When the mode is set by ODU to VIP priority, Voting priority, Capability requirements priority, Cooling priority, heating
priority, the Indoor Unit can be set to cooling, heating, dehumidification, ventilation modes. When the IDU set mode
different from the mode of ODU, the indoor unit will enters the standby mode, and the "No permission" displays in the
upper left corner of the controller.
②When the mode is set by ODU to changeover, VIP IDU can be set to cooling, heating, dehumidification, ventilation
modes, while non-VIP IDUS can only follow the operation mode of VIP's.

Outdoor Unit is Heat Recovery
①When the ODU is Heat recovery, VIP IDUs and others can have different modes such as automatic, cooling, heating,
dehumidification and ventilation mode.
②Auto mode is only available to Heat Recovery ODU. In auto mode, user should set the Tsc(cooling setting temperature)
and Tsh(heating setting temperature), which should meet the following conditions Tsc≥Tsh. The setting steps are as
follows.
<1>when enter the auto mode, the mode icon
<2> Press " " and " " to switch mode (Cool or Heat) and press"
Tsc, and Tsh in Heat). Then press " " and " "to change value and press "
<3>In auto mode, Icons
during heating operation.
<4>The heating mode and cooling mode are switched according to the following 3 conditions.
Ⅰ
The setting temperature Tsc=Tsh
When the return air temperature T1>Tsc+2℃, the IDU will run the cooling mode.
When the return air temperature T1<Tsh-2℃, the IDU will run the heating mode.
ⅡThe setting temperature Tsc>Tsh, and Tsc-Tsh<3℃
When the return air temperature T1>Tsc+1.5℃, the IDU will run the cooling mode.
When the return air temperature T1<Tsh-1.5℃, the IDU will run the heating mode.
ⅢThe setting temperature Tsc>Tsh, and Tsc-Tsh≥3℃
When the return air temperature T1>Tsc, the IDU will run the cooling mode.
When the return air temperature T1<Tsh, the IDU will run the heating mode.

Set Temperature Display
1) When switching between cooling, heating or auto modes, if temperature Ts is not reset, the temperature after
switching is the same as the temperature before switching.
2) In auto mode, switching between cooling and heating mode takes some time. The time can be set through the
controller.
48
and light up during cooling operation, when Icons
and (or
" to enter temperature setting interface (In Cool is
" to save changes.
and ) will flash at the same time
and light up