M03Q40G6-03 30/07/08
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43
HIGH PRESSURE
heating
1.
high air temperature (see operating limits)
2.
fans do not work, direction of rotation inverted
3.
insufficient air flow to coil
4.
not CONSTANT flow (for example, if the pumps
are turned off, certain areas of the plant are
excluded or included, other uses are isolated, etc)
5.
dirty air filter
6.
condensation gas in the cooling circuit o
7.
Too much refrigerant
8.
Check the trigger point for the manostat and
transducer
9.
Manostat/transducer: loose electric
contacts/terminals, wiring cables interrupted
10.
Check the manostat or transducer pressure
control point (deposits of oil, dirt, pin blocked
mechanically)
LOW PRESSURE
heating
1.
low water temperature (see operating limits)
2.
insufficient water flow to the exchanger (high
thermal difference between input and output)
3.
not CONSTANT flow (for example, if the pumps
are turned off, certain areas of the plant are
excluded or included, other uses are isolated, etc)
4.
Dirt water filter / valves open /air bubbles in the
plant
5. dirty
exchanger
6.
Manostat/transducer: loose electric
contacts/terminals, wiring cables interrupted
7.
refrigerant circuit empty, visible leaks of
refrigerant/oil, insufficient charge
8.
dryer filter clogged
9. thermostatic
device
not operating correctly
10.
Check the trigger point for the manostat and
transducer
11.
Check the manostat or transducer pressure
control point (deposits of oil, dirt, pin blocked
mechanically)
CONVERSION TABLE FOR HEATER TEMPERATURE FOR TEMPERATURE PROBES NTC
To check the reliability of the probes in the event of alarm signals, the table below shows the relationship between the
temperature and the heater value in Ohms.
Temperature Heater Temperature Heater Temperature Heater Temperature Heater
°C
Ω
°C
Ω
°C
Ω
°C
Ω
-20,0
67732
1,0
26094
22,5
11013
43,5
5146
-19,5
66149
1,5
25543
23,0
10805
44,0
5063
-19,0
64604
2,0
25005
23,5
10601
44,5
4981
-18,5
63097
2,5
24480
24,0
10401
45,0
4901
-18,0
61627
3,0
23969
24,5
10206
45,5
4823
-17,5
60193
3,5
23469
25,0
10014
46,0
4747
-17,0
58794
4,0
22982
25,5
9826
46,5
4672
-16,5
57429
4,5
22506
26,0
9643
47,0
4599
-16,0
56098
5,0
22042
26,5
9462
47,5
4527
-15,5
54800
5,5
21589
27,0
9286
48,0
4458
-15,0
53534
6,0
21146
27,5
9113
48,5
4389
-14,5
52300
6,5
20714
28,0
8944
49,0
4322
-14,0
51096
7,0
20292
28,5
8778
49,5
4256
-13,5
49921
7,5
19880
29,0
8615
50,0
4192
-13,0
48777
8,5
19085
29,5
8456
50,5
4128
-12,5
47660
9,0
18701
30,0
8300
51,0
4066
-12,0
46571
9,5
18326
30,5
8147
51,5
4005
-11,5
45510
10,0
17960
31,0
7998
52,0
3944
-11,0
44475
10,5
17602
31,5
7852
52,5
3885
-10,5
43466
11,0
17252
32,0
7708
53,0
3826
-10,0
42482
11,5
16910
32,5
7568
53,5
3767
-9,5
41523
12,0
16576
33,0
7430
54,0
3710
-9,0
40588
12,5
16249
33,5
7296
54,5
3652
-8,5
39676
13,0
15930
34,0
7164
55,0
3595
-8,0
38787
13,5
15617
34,5
7035
55,5
3538
-7,5
37920
14,0
15312
35,0
6909
56,0
3482
-7,0
37075
14,5
15013
35,5
6786
56,5
3425
-6,5
36252
15,0
14720
36,0
6665
57,0
3368
-6,0
35448
15,5
14434
36,5
6547
57,5
3310
-5,5
34665
16,0
14155
37,0
6431
58,0
3252
-5,0
33902
16,5
13881
37,5
6318
58,5
3194
-4,5
33157
17,0
13613
38,0
6208
59,0
3135
-4,0
32431
17,5
13351
38,5
6100
59,5
3075
-3,5
31724
18,0
13094
39,0
5994
60,0
3014
-3,0
31034
18,5
12843
39,5
5891
60,5
2951
-2,5
30361
19,0
12597
40,0
5790
61,0
2888
-2,0
29704
19,5
12356
40,5
5692
61,5
2822
-1,5
29064
20,0
12120
41,0
5596
62,0
2755
-1,0
28440
20,5
11890
41,5
5502
62,5
2686
-0,5
27831
21,0
11663
42,0
5410
63,0
2615
0,0
27238
21,5
11442
42,5
5320
63,5
2542
0,5
26659
22,0
11225
43,0
5232
64,0
2466
