37
Fault Handling
7-1. Fault Alarm Table
If the controller and the control panel are faulty, the code
"
EE/ED
"
will be displayed.
No.
Input Port
Fault Description
Code of
Single Unit
Controller
Code of
Centralized
Controller
Fault Handling
1
TH1
No.1 analog sensor fault (water inlet temperature)
20
20
Turn off devices
2
TH2
No.2 analog sensor fault (water outlet temperature)
21
21
Turn off devices
3
TH3
No.3 analog sensor fault (suction temperature A)
22
22
Turn off devices
4
TH4
No.4 analog sensor fault
23
23
Turn off devices
5
TH5
No.5 analog sensor fault (discharge temperature A-1)
24
24
Turn off devices
6
TH6
No.6 analog sensor fault (discharge temperature A-2)
25
25
Turn off devices
7
TH7
No.7 analog sensor fault (ambient temperature)
26
26
Turn off devices
8
TH8
No.8 analog sensor fault (suction temperature B)
27
27
Turn off devices
2
9
TH9
No.9 analog sensor fault
28
28
Turn off devices
2
10
TH10
No.10 analog sensor fault (discharge temperature B-1)
29
29
Turn off devices
2
11
TH11
No.11 analog sensor fault (discharge temperature B-2)
2A
2A
Turn off devices
2
12
TH12
No.12 analog sensor fault (total water outlet temperature)
2B
2B
Turn off devices
4
13
CN13
No.13 analog sensor fault (suction pressure A)
2C
2C
Turn off devices
14
CN14
No.14 analog sensor fault (suction pressure B)
2D
2D
Turn off devices
2
15
IND3
High-pressure switch of system B
H2
65
Turn off devices
2
16
IND4
High-pressure switch of system A
H1
65
Turn off devices
17
IND5
Water flow switch alarm
FL
6D
Turn off devices
18
IND6
Overload of water pump
OP
6A
Turn off devices
19
IND8
Overload of compressor A-1 or A-2
C1
68
Turn off devices
20
IND9
Overload of compressor B-1 or B-2
C2
69
Turn off devices
2
21
CN13
Low-pressure of system A
L1
66
Turn off devices
22
CN14
Low-pressure of system B
L2
67
Turn off devices
2
23
TH1,TH2
and
TH1TH2
Refrigeration antifreezeing alarm
E3
8D
Switch off all compressors. The water
pump continuously operates.
1
24
TH3, TH8
Abnormal suction temperature
E4
91
Switch off all compressors.
The water pump continuously operates.
12
25
CN13
Low pressure overrun of system A
78
78
Switch off the compressor of the system A.
If this fault occurs twice, switch off and give
an alarm.
26
CN14
Low pressure overrun of system B
7A
7A
Switch off the compressor of the system B.
If this fault occurs twice, switch off and give
an alarm.
27
CN15
High pressure overrun of system A
2E
2E
Switch off the compressor of the system A.
If this fault occurs twice, switch off and give
an alarm.
28
CN16
High pressure overrun of system B
2F
2F
Switch off the compressor of the system B.
If this fault occurs twice, switch off and give
an alarm.
29
TH7
The ambient temperature exceeds the working range
87
87
Turn off devices
30
CN29
Communication fault between control panel and modular controller
ED
--
Turn off devices
2
31
CN4/XP1
Communication fault between single unit controller and mainboard
--
EE
Turn off devices
32
TH5/TH6/
TH10/TH11
Abnormal discharge temperature
AC/AD/ AE/
AF
AC/AD/ AE/
AF
Turn off devices
33
--
Inlet and outlet of water pipe is reversed
A0
A0
Turn off devices
34
--
Configuration error of model
E1
E1
Turn off devices
In case of fault, the controller and the centralized controller will show corresponding fault code and conduct fault handling, the alarm output
relay will be closed.
When all the fault input terminals are disconnected, it means fault alarm; when all the fault input terminals are closed, it means normal.
After the fault is cleared, the system will maintain fault status (to remind user for unit inspection). The system will restore the operating status
before the fault only after user press the
"
Reset
"
key (only reset one fault at a time in case of multiple faults) or restart the unit.
All the faults must be reset manually.
Note: The faults in this table are only displayed on the single unit controller and the modular controller.
Note 1: When this fault occurs, switch off all compressors. The water pump will continuously operate.
Note 2: Lock
"
antifreezing locking time of plate type heat exchanger for refrigeration unit
"
. the fault is permitted to be manually reset only when
the water temperature is recovered to the normal state.
Note 3: This alarm code will be displayed only when
"
module control
"
is selected. Note 4: This alarm code will be displayed only when
"
module control
"
is selected and it is a host unit (A0).
7 Fault Handling
