Trane Koolman R410A - Page 35

35
PKGP-SVX03D-EN
Troubleshooting and Diagnostics
A total of 17 failure input alarm switches, as well as 1 fault output alarm switch, are provided for
dual 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 TH5
Defrost temperature sensing line
2 in short/open circuit
A S2
81
All peripherals are to be closed.
6 TH6
Discharge temperature short/open
circuit
A S3
83
All peripherals are to be closed.
7 OVHT/HP2
Compressor 2 high voltage
pressure alarming
E H2
65
Only compressor 2 is to be shut down.
8 FLOW Inadequate water ow D FL
6D
All peripherals are to be closed.
9 OV-PUMP Water pump overloaded B OP
6A
All peripherals are to be closed.
10 OV-FAN Fan overloaded B OF
6B
All peripherals are to be closed.
11 OV-COMP1
Compressor 1 overloaded /
Compressor 1 middlum-pressure
alarming
C 78
78
Only compressor 1 is to be shut down.
12 OV-COMP2
Compressor 2 overloaded /
Compressor 2 middlum-pressure
alarming
E 78
78
Only compressor 2 is to be shut down.
13 HP1
Compressor 1 high voltage
pressure alarming
C H1
64
Only compressor 1 is to be shut down.
14 LP1
Compressor 1 low voltage
pressure alarming
C L1
66
Only compressor 1 is to be shut down.
15 FREZ/LP2
Compressor 2 low voltage
pressure alarming
E L2
67
Only compressor 2 is to be shut down.
16 / / /
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.
17 TH3
Discharge temperature 1 is too
high.
D 94
94
Only compressor 1 is to be shut down.
18 TH6
Discharge temperature 2 is too
high.
D 94 94 Only compressor 2 is to be shut down.
19 TH4 Coil 1 temperature is too high. C 98 98 Only compressor 1 is to be shut down.
20 TH5 Coil 2 temperature is too high. C 98 98 Only compressor 2 is to be shut down.
21 TH2
BPHE outlet water temperature is
too high.
C 90 90 All peripherals are to be closed.