[ VII Control ]
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HWE1018A GB
-14- Capacity Control between Outdoor Units (when two refrigerant circuits are connected)
The following two capacity control methods between indoor units are available.
Control to make only one of the outdoor units (which has the smaller address) operate and keep running during low-load hours
at startup.
Control to make one of the outdoor units stop, and the other outdoor unit operate when the load becomes low during normal
operation. After a certain period of time has passed since only one of the outdoor units started operation, the unit in operation
stops, and the other outdoor unit starts operation automatically.
(1) Starting Conditions
Air conditioning load that is calculated based on the return air temperature is 50% or above.
Operation frequencies of both indoor and outdoor units remain near the minimum level three minutes after start-up.
(2) Stopping Conditions
When operation frequency of the running unit rises up near the maximum capacity.
When it is determined that the load is over 50%, using suction temperature as a reference.
When compressor stops while running only one unit.
-15- Dehumidification priority control
The dehumidification priority control is the control to increase the amount of dehumidification by increasing the frequency of
the compressor when the external signal (dehumidification command) is received during cooling operation.
During dehumidification priority control, the room temperature may drop below the preset temperature set during normal op-
eration.
Under this control, the set temperature wil be compulsory at the minimum value.
(Under discharge temperature control:14°C[57°F] Under suction temperature conrol:19°C[66°F])
The temperature nor the humidity can be controlled simultaneously as the reheat function is not available.
-16- Operation Mode
(1) Indoor unit operation mode
The operation mode can be selected from the following 4 modes using the remote controller.
(2) Outdoor unit operation mode
The heating mode can be used for standby of the indoor unit when the outdoor temperature is low. Confirm that the devices
to be cooled are not influenced by the heat.
The discharge temperature control cannot be used.
The discharge temperature is controlled not to drop less or equal 30°C[86°F]. It may take time to reach the indoor target tem-
perature.
When the indoor temperature reaches the cooling operation range, switch the operation from heating to cooling.
1 Cooling mode
2 Heating mode
3Fan mode
4 Stopping mode
1 Cooling mode All indoor units in operation are in cooling mode.
2 Heating mode All indoor units in operation are in heating mode.
3 Stopping mode All indoor units are in fan mode or stopping mode.
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