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Operation
The JVP is equipped with a control unit (see below).
Figure 3: LMC 223 Control Unit
The control unit is used to control heat pump operation.
The unit has 2 diodes to the left of the display:
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the upper diode is illuminated when the heat pump is operating.
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the lower diode is illuminated when the auxiliary heating is operating.
The backlight in the display flashes when the system's alarm device is triggered.
Nilan LMC220 control unit is controlled solely by turning the knob to the right of the display. The
knob has three functions:
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Turn clockwise: Go to next menu item or increase the last value in the display.
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Turn anticlockwise: Go to previous menu item or reduce the last value in the display.
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Press: Select sub-menu, activate adjustment of value, or approve the last value.
The light in the display is illuminated when the unit is being operated. The light switches off after 30
seconds if the unit is not activated by the user. The control unit will revert to the start screen (status
menu) after five minutes if the unit is inactive.
Menu Selection
To switch between the menus, turn the knob.
Menus with an arrow at bottom right also have a sub-menu. To activate a sub-menu, press once
on the knob. To switch between sub-menu items, turn the knob. To exit the sub-menu, turn forward
or back until "Menu up" appears in the display. Then press the knob.
Service Menu
The sub-menus in the service menu are not accessible during normal operation. They are for use
in connection with installation and service.
Setting values
To set values in the display:
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Turn the knob until the value you wish to change is shown in the display.
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Press the knob to activate the value. The value will flash, if it can be changed.
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To change the value, turn the knob.
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Press the knob to accept the value shown. The value will stop flashing.
