Fault finding – Grant Products HPAW155 User Manual
Page 43
Fault Finding
39
Protection/failure
Display
Inlet water temperature sensor failure
PP 1
Coil temperature sensor failure
PP 3
Ambient temperature sensor failure
PP 5
Winter anti-freeze protection
PP 7
High pressure
EE 1
Low pressure
EE 2
Flow switch
EE 3
Wrong/ miss phase
EE 4
Electrical shock protection
EE 5
Defrosting
Defrosting indicator
communication failure
EE 8
Item Field
Num Field
Display
E01
Err
EEprom read error
BOIL OUT
SHr
HP Flow sensor short
BOIL OUT
OPn
HP Flow sensor open
BOIL IN
SHr
HP return sensor short
BOIL IN
OPn
HP return sensor open
SUP
SHr
Supply sensor short
SUP
OPn
EE 3Supply sensor open
OUTDR
SHr
Outdoor sensor short
OUTDR
OPn
Outdoor supply sensor open
Figure 13-4: ATC fault codes
Figure 13-3: BTC sensor resistance table
Figure 13-5: BTC fault codes
Temperature
Resistance
Temperature
Resistance
Temperature
Resistance
Temperature
Resistance
˚C
k
W
˚C
k
W
˚C
k
W
˚C
W
-46
490.813
-7
46.218
32
7.334
71
1,689
-43
405.710
-4
39.913
35
6.532
74
1,538
-40
336.606
-1
34.558
38
5.828
77
1,403
-37
280.279
2
29.996
41
5.210
79
1,281
-34
234.196
4
26.099
43
4.665
82
1,172
-32
196.358
7
22.763
46
4.184
85
1,073
-29
165.180
10
19.900
49
3.760
88
983
-26
139.402
13
17.436
52
3.383
91
903
-23
118.018
16
15.311
54
3.050
93
829
-21
100.221
18
13.474
57
2.754
96
763
-18
85.362
21
11.883
60
2.490
99
703
-15
72.918
24
10.501
63
2.255
102
648
-12
62.465
27
9.299
66
2.045
104
598
-9
53.658
29
8.250
68
1.857
107
553
BTC