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17. External Compressor SW
Initial setting: No
System setup
12:00am,Mon
External Error signal
Demand control
SG ready
External compressor SW
Select
Confirm
Set when external compressor SW is connected.
SW is connected to external devices to control power consumption, Open Signal will stop
compressor’s operation. (Heating operation etc. are not cancelled).
(NOTE) Does not display if there is no Optional PCB.
If follow Swiss standard power connection, need to turn on DIP SW (SW2 pin3) of main unit PCB.
Short/Open signal used to ON/OFF tank heater (for sterilization purpose)
18. Circulation Liquid
Initial setting: Water
System setup
12:00am,Mon
Demand control
SG ready
External compressor SW
Circulation liquid
Select
Confirm
Set circulation of heating water.
There are 2 types of settings, water and glycol.
(NOTE) Please set glycol when using anti-freeze liquid.
It may cause error if setting is wrong.
19. Heat-Cool SW
Initial setting: Disable
System setup
12:00am,Mon
SG ready
External compressor SW
Circulation liquid
Heat-Cool SW
Select
Confirm
Able to switch (fix) heating & cooling by external switch.
(Open) : Fix at Heating (HDHW)
(Short) : Fix at Cooling (CDHW)
(NOTE) This setting is disabled for model without Cooling.
(NOTE) Does not display if there is no Optional PCB.
Timer function cannot be used. Cannot use Auto mode.
20. Force Heater
Initial setting: Manual
System setup
12:00am,Mon
External compressor SW
Circulation liquid
Heat-Cool SW
Force Heater
Select
Confirm
Under manual mode, user can turn on force heater through quick menu.
If selection is ‘auto’, force heater mode will turn automatically if pop up error happen during
operation.
Force heater will operate follow the latest mode selection, mode selection is disable under
force heater operation.
Heater source will ON during force heater mode.
21. Force Defrost
Initial setting: Manual
System setup
12:00am,Mon
12:00am,Mon
12:00am,Mon
Circulation liquid
Heat-Cool SW
Force heater
Force defrost
Select
Confirm
Under manual code, user can turn on force defrost through quick menu.
If selection is ‘auto’, outdoor unit will run defrost operation once if heat pump have long hour of
heating without any defrost operation before at low ambient condition.
(Even auto is selected, user still can turn on force defrost through quick menu)
22. Defrost signal
Initial setting: No
System setup
Heat-Cool SW
Force heater
Force defrost
Defrost signal
Select
Confirm
Defrost signal sharing same terminal as bivalent contact in main board. When defrost signal set
to YES, bivalent connection reset to NO. Only one function can be set between defrost signal
and bivalent.
When defrost signal set to YES, during defrost operation is running at outdoor unit defrost signal
contact turn ON. Defrost signal contact turn OFF after defrost operation end.
(Purpose of this contact output is to stop indoor fan coil or water pump during defrost operation).
23. Pump flowrate
Initial setting: T
System setup
Force heater
Force defrost
Defrost signal
Pump flowrate
Select
Confirm
If pump flowrate setting is T, unit adjust pump duty to get different of water inlet and outlet
base on setting on * T for heating ON and * T for cooling ON in operation setup menu
during room side operation.
If pump flowrate setting is set to Max. duty, unit will set the pump duty to the set duty at
*Pump maximum speed in service setup menu during room side operation.
