15
O&I manual
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Detail information
No.
COM (I) 485 communication port (fault code E2)
COM (O) is interconnected with P, Q and E of COM (I), used for RS-485 communication.
1) If faults occur between the wired controller and the main unit module, all modules will be shut down.
2) If faults occur between the main unit and subordinate units, the subordinate unit module suffering
communication fault will be shut down. Less units will be detected by the wired controller, which may
display EA, and in the meanwhile, the indicator lamp of the wired controller will flash.
estart 3 minutes later after malfunction be removed.
8
9
A
B
C
D
E
F
8 7
6
5
4
3
2
1
0
0 1
2
3
4
5
6
7
8
F
E
D
C
B
A
9 8
ADDRRSS
When the address
is 1,2,3……F, it
serves as the
subordinate unit
1,2,3……15.
When the
address is 0, it
serves as the
main unit.
Each modular part of modular unit has the same
electric control function, and the main unit and
subordinate units can be set through address code
on the electric control board. The address code 0 #
is provided as the main unit. The priority of being
the main unit is given to the unit with digital
compressor, and other addresses are subordinate
units. Only the unit is chosen as the main unit, its
electric control can activate such functions as
direct communication with the wired controller,
refrigerating and heating capability adjustment,
pump control, auxiliary electric heater control, total
effluent temperature detection and water flow
switch detection.
COM (O) 485 communication port (fault code E2)
high-pressure protection of the system A and discharge temperature switch protection (protection code P0);
high-pressure protection of the system B and discharge temperature switch protection (protection code P2);
low-pressure protection of the system A (protection code P1);
low-pressure protection of the system B (protection code P3);
Constant speed compressor: connection of discharge temperature switch and high-pressure switch of the
system in series.
Inlet water temperature sensor T62 (TBH2) (fault code EF)
Shell and tube low-temperature ant-freeze sensor T61 (TBH1) (fault code Eb)
Water flow detection (fault code of the main unit E0) is only valid for the main unit but invalid for subordi-
nate units.
1) Main unit: if abnormal water flow occurs for the first and second time, the main unit board will display
fault code E9. If abnormal water flow occurs the third time, the main unit board will display fault code E0
(off-power recovery is needed), and the wired controller will display fault code E0 (fault is displayed only
after 3 detection).
2) Subordinate unit: (water flow detection will not be done).
Control port (reserved)
Electronic expansion valve of the system B
Electronic expansion valve of the system A
Electronic expansion valve is used to control refrigerant flow under different operating modes and different loads.
Summary of Contents for ICHS-600KC-5
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