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Key changers between previous generation Heat Pump VRF and the
current "U" generation Heat Pump VRF are;
Where the outdoor unit is a stand-alone system, the unit needs setting up as a Header, this is done via the
"Dip Switches" located in the outdoor unit, switch SW101 bit 1 needs to be set to the ON position, and
SW100 bit 2 also needs to be set to the ON position.
The same rule applies when the outdoor unit is a part of a multiple system, i.e. up to 5 outdoor units can be
modulised to form a single system, in this situation one outdoor unit needs to be configured as a "Header
Unit", this would be the largest outdoor unit and it would be the outdoor unit nearest to the indoor units
via the installed pipe work.
Failure to follow the above would produce an "E19" error code.
fig 16
If the equipment is to be connected to a central remote control or a BMS interface, then the
"System Address" might need amending.
When the equipment leaves the factory ALL units are configured to be System Address ONE, when one
or more unit is being connected to a single Central Remote / BMS interface, each outdoor unit must have
) to 28, system addresses MUST be amended
a unique system address, addresses available are 1 (
Factory
PRIOR to instigating the auto address procedure.
-8-
Cool Designs Ltd makes every effort to ensure that the information provided within this publication is correct and error free, however we cannot guarantee that it is free of inaccuracies,
errors or omissions. Users should seek to clarify this information for themselves prior to basing any decisions upon such information.
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