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Dehumidi cation control wiring
S4
DH
ON
1 2
R
S4-1 DIP switch of
Perform disconnection and short-circuit to
achieve partition, control or dehumidifcation
Dehumidi cation control requires indirect
humidi er at DH and R. Set S4-1 as OFF.
When the humidity rises and exceeds the set
value of the humidi er, the 24V signal of DH
changes to 0V, the refrigeration system starts the
dehumidi cation operation, and the air volume
drops to 80% of the nominal refrigeration air
volume.
When the partition control, DH is connected to
the DH port of the partition controller. When the
24V signal of DH changes to 0V, the air volume
drops to 80% of the nominal refrigeration air
volume.
•
UV, fresh air or negative ion wiring
work
24V control signal or 208/230V power supply
The WORK port is linked with the fan. When the
fan is running, the relay is closed; if an active 24V
signal is required, it can be directly connected to
the G and C ports.
Page 42
HUMIDISTAT
UV, fresh wind or
negative ions, etc
Control Logic
Indoor unit Connector
Connector
Purpose
R
24V
C
COM
G
Fan
Y
First period cooling
Y/Y2
Second period cooling
B
Heating(Four-way valve)
W
Heating operation
W1
Electric heating operation 1
W2
Electric heating operation 2
E/AUX
Emergency heating
DH/DS/BK
Drying regionally
L
Error signal
LED DISPLAY
The control displays active faults switchs on the
LED display. When the control displays the fault
switch and the LED ashes quickly, there is
something wrong with the system. Refer to the
detailed fault switchs.
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