4.6 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 and (or and ) will flash at the same time
<2> Press " " and " " to switch mode (Cool or Heat) and press" " to enter temperature setting interface (In Cool is
Tsc, and Tsh in Heat). Then press " " and " "to change value and press " " to save changes.
<3>In auto mode, Icons and light up during cooling operation, when Icons and light up
during heating operation.
<4>The heating mode and cooling mode are switched according to the following 3 conditions.
ⅠThe 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.
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