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Note: the output control lines of the AC contactors for the running indicator, water pump 1, water pump
2, auxiliary electric heater 1, auxiliary electric heater 2 can be wired to the corresponding wiring board
of all units, while those for the error indicator and external passive contact switch should be wired to the
corresponding wiring board of all units as shown in the figure below.
When external passive contact switch is available for multiple units, the wiring board
9 and 10 of each unit should be wired to the dry contact A and B.
When it is required to display errors of several units, the wiring terminals (3, 4) of each
unit should be wired to the wiring terminals HL2 (C, D) of the error indicator. (If it is
required to display the error of each unit independently, then the error indicator of each
unit should be wired independently to the corresponding error output wiring terminals
(3,4) of each unit.
When multiple modules have direct control over one water pump, wiring terminals 5
and 6 for one modular unit are connected to terminals E and F respectively of the AC
contactor (KM1) for the water pump, or 7 and 8 to E and F respectively of an AC
contactor (KM2).
Unit 2
Unit 1
Unit 1
5
5
E
KM1
A Series Inverter Modular Air-cooled Chiller (Heat Pump)
Unit 3
5
20
Unit 16
Unit 16
5
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