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Opto-coupler Accessory
THE FAN AND ANCILLARY CONTROL EQUIPMENT MUST BE ISOLATED FROM
THE POWER SUPPLY DURING ANY MAINTENANCE AND WHEN FITTING THIS
Connecting an Opto-coupler
The LED terminals are intended to drive a remote LED to indicate that a fault has occurred. They
provide a LED driving signal output between the + and – terminals that enables remote indication
of a unit fault. See the Control Panel for fault code (See page 17). This signal could also be used
by a BMS system so that its informed that a fault has occurred. If a volt-free contact is required
then use this opto-coupler to provide electrical separation.
Connect the flying leads of the opto-coupler pcb into the LED terminals, + to + and - to -
Connect the pair of leads from the BMS to the terminal block of the opto-coupler pcb. Polarity does
matter here.
Remote LED Indicator and Lead Accessory
The LED terminals are intended to drive a remote LED to indicate that there is a message in the control
display.
They provide a LED driving signal output between the + and – terminals that enables remote indication of
filter check or unit fault. See the Control Panel for message (See page 17 for fault codes).
Connect the 2 core flying lead from the Remote LED indicator terminal block. Terminal 1 on the Remote
LED is + and terminal 2 is –
MVHR Installation and User Guide 476930
WARNING
CONTROL MODULE.
Accessories
55
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