Output Circuit; Input/Output Circuit - Mitsubishi Electric AHU-KIT-SP Manual

Output circuit

●Digital output circuit
・The digital output terminal output ON/OFF status.
・The functions of the digital output are as follows.
Terminal Function
X4a Outdoor unit/interface error
X4b Compressor ON
X4c Defrost ON
X4d Function selectable*
●LED output circuit
・The LED output shows the normal/abnormal status of the system.
・LED 1 (green): blinks at 0.5 sec intervals during normal operation.
・LED 2 (red): flashes when abnormal (lights out when normal).
The number of flashes changes depending on the error status. For details, refer to (13) error display.

Input/output circuit

・Input/output functions are as follows.
Item Connector Housing
X1 2P Remote control
X5 3P Modbus
Input/output 2P Cascade control
X7
2P Cascade control (reserve)
X0 5P Power (X0-2 is an empty port)
・X5 : Modbus communication circuit terminal.
X5-1 A polor
X5-2 B polor
X5-3 GND
JX1 1–2: not available
(termination) 2–3: available 100Ω
・X7 : Cascade connection terminal.
However, X7-3 and X7-4 are reserve circuits.
ON OFF
Error Normal
Compressor ON Compressor OFF
Defrost ON Defrost OFF
Run Stop
Function
(*) Setting of Xd4 can be changed by SW8 -1.
Digital Output:X4d
DipSW8-1
Function
ON Operation mode output Heating
Run/stop
OFF
(Fan ON/OFF) (Fan ON)
Digital output
Voltage free a contact output
X4d X4c
ON OFF
Cooling
Run Stop
(Fan OFF)
MODEL NAME
Air Handling Unit Interface
MODEL TYPE
AHU-KIT-SP
ISSUE CLASSIFICATION
SPECIFICATION
MORIKAWA
DWG NO.
PSZ000Z308
21.09.17
X4b X4a
REV.MARK PAGE
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