34
Troubleshooting and Diagnostics
Troubleshooting checklist
"EE" code is displayed as controller and control panel communication fails.
A total of 13 fault input alarm switches, as well as 1 failure output alarm switch, are provided for
single compressor system
S/N Input port Fault Description
Type Code
Central
Controller
Code
Troubleshooting
1
TH1
Return water temperature sensing
line in short/open circuit
A
SE
84
All peripherals are to be closed.
2
TH2
Outlet water temperature sensing
line in short/open circuit
A
SL
85
All peripherals are to be closed.
3
TH3
Discharge temperature 1 in short/
open circuit
A
Sd
82
All peripherals are to be closed.
4
TH4
Defrost temperature sensing line
1 in short/open circuit
A
S1
7F
All peripherals are to be closed.
5
OVHT/HP2
Electric heating overload
B
H2
65
The electric heater is to be closed.
6
FLOW
Inadequate water flow
D
FL
6D
All peripherals are to be closed.
7
OV-PUMP
Water pump overloaded
B
OP
6A
All peripherals are to be closed.
8
OV-FAN
Compressor 1 middlum-pressure
alarming
B
78
78
All peripherals are to be closed.
9
OV-COMP1 Compressor 1 overloaded
C
C1
68
Only compressor 1 is to be shut down.
10
HP1
Compressor 1 high voltage
pressure alarming
C
H1
64
Only compressor 1 is to be shut down.
11
LP1
Compressor 1 low voltage
pressure alarming
C
L1
66
Only compressor 1 is to be shut down.
12
/ / /
Refrigerating outlet water
temperature is too low.
D
E3
8D
The compressor is to be shut down, while
the auxiliary heater of water pump is to work.
13
TH3
Discharge temperature is too high.
D
94
94
The compressor is to be shut down, while
the auxiliary heater of water pump is to work.
14
TH4
Coil temperature is too high.
C
98
98
All peripherals are to be closed.
15
TH2
BPHE outlet water temperature is
too high.
C
90
90
All peripherals are to be closed.
Содержание Koolman R410A
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