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Digital input Di1/Di2
• The digital input Di1 is the interface between controller EXD-HP1 and system controller if Modbus
communication has not been used.
• The digital status is dependent to operation of system's compressor or demand.
Operating Condition
Digital input status
Compressor starts
Closed (Start)
Compressor stops
Open (Stop)
Manual mode operation
Warning: All alarms are disabled during manual control. We do not recommend unattended operation of system
during manual control.
Manual alarm reset clearing functional alarms (except hardware error)
EXD – HP1 Error/ Alarm handling
T-CU01-MAR21-3
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