Tranquility
®
Fluid Cooler – 60 Hz
R e v. : F e b r u a r y 2 2 , 2 0 2 2
c l i m a t e m a s t e r.c o m
33
Troubleshooting
General
If operational difficulties are encountered, perform
the preliminary checks below before referring to the
troubleshooting charts.
• Verify that the unit is receiving electrical supply
power.
• Make sure the fuses in the fused disconnect
switches are intact.
After completing the preliminary checks described
above, inspect for other obvious problems such as
leaking connections, broken or disconnected wires, etc.
If everything appears to be in order, but the unit still fails
to operate properly, verify inputs from the heat pump
and from the internal sensors.
AXM Board
AXM board troubleshooting in general is best
accomplished by first verifying inputs and outputs. After
these have been verified, board operation is confirmed
and the problem must be elsewhere. Below are some
general guidelines for troubleshooting the AXM control.
Field Inputs
A 24VAC signal is supplied from the heat pump to the
control board contained in the TFC unit. Verify that
24VAC is present between Y1 and C, and between O
and C at the control board.
Sensor Inputs
All sensor inputs are ‘paired wires’ connecting each
component to the board. The thermistor resistance
should be measured with the connector removed from
the control board so that only the impedance of the
thermistor is measured. If desired, this reading can be
compared to the thermistor resistance chart shown in
Table 9. An ice bath can be used to check the calibration
of the thermistor.
Table 9: Nominal resistance at various temperatures
Temp (ºC)
Temp (ºF)
Resistance
(kOhm)
Temp (ºC) Temp (ºF)
Resistance
(kOhm)
-17.8
0.0
85.34
55
131.0
2.99
-17.5
0.5
84.00
56
132.8
2.88
-16.9
1.5
81.38
57
134.6
2.77
-12
10.4
61.70
58
136.4
2.67
-11
12.2
58.40
59
138.2
2.58
-10
14.0
55.30
60
140.0
2.49
-9
15.8
52.38
61
141.8
2.40
-8
17.6
49.64
62
143.6
2.32
-7
19.4
47.05
63
145.4
2.23
-6
21.2
44.61
64
147.2
2.16
-5
23.0
42.32
65
149.0
2.08
-4
24.8
40.15
66
150.8
2.01
-3
26.6
38.11
67
152.6
1.94
-2
28.4
36.18
68
154.4
1.88
-1
30.2
34.37
69
156.2
1.81
0
32.0
32.65
70
158.0
1.75
1
33.8
31.03
71
159.8
1.69
2
35.6
29.50
72
161.6
1.64
3
37.4
28.05
73
163.4
1.58
4
39.2
26.69
74
165.2
1.53
5
41.0
25.39
75
167.0
1.48
6
42.8
24.17
76
168.8
1.43
7
44.6
23.02
77
170.6
1.39
8
46.4
21.92
78
172.4
1.34
9
48.2
20.88
79
174.2
1.30
10
50.0
19.90
80
176.0
1.26
11
51.8
18.97
81
177.8
1.22
12
53.6
18.09
82
179.6
1.18
13
55.4
17.26
83
181.4
1.14
14
57.2
16.46
84
183.2
1.10
15
59.0
15.71
85
185.0
1.07
16
60.8
15.00
86
186.8
1.04
17
62.6
14.32
87
188.6
1.01
18
64.4
13.68
88
190.4
0.97
19
66.2
13.07
89
192.2
0.94
20
68.0
12.49
90
194.0
0.92
21
69.8
11.94
91
195.8
0.89
22
71.6
11.42
92
197.6
0.86
23
73.4
10.92
93
199.4
0.84
24
75.2
10.45
94
201.2
0.81
25
77.0
10.00
95
203.0
0.79
26
78.8
9.57
96
204.8
0.76
27
80.6
9.16
97
206.6
0.74
28
82.4
8.78
98
208.4
0.72
29
84.2
8.41
99
210.2
0.70
30
86.0
8.06
100
212.0
0.68
31
87.8
7.72
101
213.8
0.66
32
89.6
7.40
102
215.6
0.64
33
91.4
7.10
103
217.4
0.62
34
93.2
6.81
104
219.2
0.60
35
95.0
6.53
105
221.0
0.59
36
96.8
6.27
106
222.8
0.57
37
98.6
6.01
107
224.6
0.55
38
100.4
5.77
108
226.4
0.54
39
102.2
5.54
109
228.2
0.52
40
104.0
5.33
110
230.0
0.51
41
105.8
5.12
111
231.8
0.50
42
107.6
4.92
112
233.6
0.48
43
109.4
4.72
113
235.4
0.47
44
111.2
4.54
114
237.2
0.46
45
113.0
4.37
115
239.0
0.44
46
114.8
4.20
116
240.8
0.43
47
116.6
4.04
117
242.6
0.42
48
118.4
3.89
118
244.4
0.41
49
120.2
3.74
119
246.2
0.40
50
122.0
3.60
120
248.0
0.39
51
123.8
3.47
121
249.8
0.38
52
125.6
3.34
122
251.6
0.37
53
127.4
3.22
123
253.4
0.36
54
129.2
3.10
