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HWE09080 GB
(2) Heat source unit (cooling only, heating only, cooling main and heating main modes)
Start
Breaker
turned on
Operation
command
Error stop
Error display on the
heat source unit LED
Self-holding of
protection function
Operation command
to the BC controller
Operation
mode
Error mode
72C ON
*Note 1
*Note 2
*Note 3
*Note 4
YES
YES
YES
YES
NO
NO
NO
fan
NO
"HO" / "PLEASE WAIT" blinks
on the remote controller
Operation command to the BC controller
Cooling only, Heating only
Mixture of units in cooling and heating
Mixture of units in cooling and heating
Protection function
self-holding cancelled.
Normal operation
1. 52C1 4-way valve OFF
2. Inverter output 0Hz
3. All solenoid valves OFF
Cooling Only Heating Only
2
2
Cooling Main
Operation
mode
Operation
mode
*Note 1. For about 3 minutes after power on, search for the indoor unit address, for the remote controller address,
and for the group information will start. During this, "HO"
/ "PLEASE WAIT" blinks on the display of the
remote controller. When the indoor unit to be controlled by the remote controller is missing,
"HO"
/ "PLEASE WAIT" keeps blinking on the display of the remote controller even after 3 or more minutes
after power on.
*Note 3. The units will follow the operation mode commands from the BC controller
*Note 4. When the operation mode commands from the BC controllers are mixed (both cooling and heating), the
actual operation mode is determined by the heat source unit.
*Note 2. The system may go into the error mode on either the indoor unit or the heat source unit side. The heat
source unit stops only when all of the connected indoor units are experiencing problems. The operation of
even a single indoor unit will keep the heat source unit running. The error will be indicated on the LED display.
Heating Main
Indoor units
registered to the
remote controller
Error
Unit in the stopped state