Troubleshooting - ClimateMaster Tranquility 30 Digital TE Series Installation, Operation & Maintenance Instructions Manual
Residential horizontal, vertical & downflow packaged geothermal heat pumps
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- Installation operation & maintenance (72 pages)
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Tranquility
30 Digital ( TE) Series IOM - 60Hz HFC-410A
®
R e v . : O c t o b e r 5 , 2 0 2 1
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, refer to the "DXM2 Troubleshooting Process
Flowchart" or "Functional Troubleshooting Chart."
DXM2 Board
DXM2 board troubleshooting in general is best summarized
as verifying inputs and outputs. After inputs and outputs have
been verified, board operation is confirmed and the problem
must be elsewhere. Below are some general guidelines for
troubleshooting the DXM2 control.
Field Inputs
Conventional thermostat inputs are 24VAC from the
thermostat and can be verified using a voltmeter between C
and Y1, Y2, W, O, G. 24VAC will be present at the terminal
(for example, between "Y1" and "C") if the thermostat is
sending an input to the DXM2 board.
Proper communications with a thermostat can be verified
using the Fault LED on the DXM2. If the control is NOT
in the Test mode and is NOT currently locked out or in
a retry delay, the Fault LED on the DXM2 will flash very
slowly (1 second on, 5 seconds off), if the DXM2 is properly
communicating with the thermostat.
Sensor Inputs
All sensor inputs are 'paired wires' connecting each component
to the board. Therefore, continuity on pressure switches,
for example can be checked at the board connector. The
thermistor resistance should be measured with the connector
removed 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 17. An ice bath can
be used to check the calibration of the thermistor.
58
Table 17: Nominal resistance at various temperatures
Temp (ºC)
-17.8
-17.5
-16.9
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
G e o t h e r m a l H e a t i n g a n d C o o l i n g
Resistance
Temp (ºF)
Temp (ºC) Temp (ºF)
(kOhm)
0.0
85.34
55
0.5
84.00
56
1.5
81.38
57
10.4
61.70
58
12.2
58.40
59
14.0
55.30
60
15.8
52.38
61
17.6
49.64
62
19.4
47.05
63
21.2
44.61
64
23.0
42.32
65
24.8
40.15
66
26.6
38.11
67
28.4
36.18
68
30.2
34.37
69
32.0
32.65
70
33.8
31.03
71
35.6
29.50
72
37.4
28.05
73
39.2
26.69
74
41.0
25.39
75
42.8
24.17
76
44.6
23.02
77
46.4
21.92
78
48.2
20.88
79
50.0
19.90
80
51.8
18.97
81
53.6
18.09
82
55.4
17.26
83
57.2
16.46
84
59.0
15.71
85
60.8
15.00
86
62.6
14.32
87
64.4
13.68
88
66.2
13.07
89
68.0
12.49
90
69.8
11.94
91
71.6
11.42
92
73.4
10.92
93
75.2
10.45
94
77.0
10.00
95
78.8
9.57
96
80.6
9.16
97
82.4
8.78
98
84.2
8.41
99
86.0
8.06
100
87.8
7.72
101
89.6
7.40
102
91.4
7.10
103
93.2
6.81
104
95.0
6.53
105
96.8
6.27
106
98.6
6.01
107
100.4
5.77
108
102.2
5.54
109
104.0
5.33
110
105.8
5.12
111
107.6
4.92
112
109.4
4.72
113
111.2
4.54
114
113.0
4.37
115
114.8
4.20
116
116.6
4.04
117
118.4
3.89
118
120.2
3.74
119
122.0
3.60
120
123.8
3.47
121
125.6
3.34
122
127.4
3.22
123
129.2
3.10
Resistance
(kOhm)
131.0
2.99
132.8
2.88
134.6
2.77
136.4
2.67
138.2
2.58
140.0
2.49
141.8
2.40
143.6
2.32
145.4
2.23
147.2
2.16
149.0
2.08
150.8
2.01
152.6
1.94
154.4
1.88
156.2
1.81
158.0
1.75
159.8
1.69
161.6
1.64
163.4
1.58
165.2
1.53
167.0
1.48
168.8
1.43
170.6
1.39
172.4
1.34
174.2
1.30
176.0
1.26
177.8
1.22
179.6
1.18
181.4
1.14
183.2
1.10
185.0
1.07
186.8
1.04
188.6
1.01
190.4
0.97
192.2
0.94
194.0
0.92
195.8
0.89
197.6
0.86
199.4
0.84
201.2
0.81
203.0
0.79
204.8
0.76
206.6
0.74
208.4
0.72
210.2
0.70
212.0
0.68
213.8
0.66
215.6
0.64
217.4
0.62
219.2
0.60
221.0
0.59
222.8
0.57
224.6
0.55
226.4
0.54
228.2
0.52
230.0
0.51
231.8
0.50
233.6
0.48
235.4
0.47
237.2
0.46
239.0
0.44
240.8
0.43
242.6
0.42
244.4
0.41
246.2
0.40
248.0
0.39
249.8
0.38
251.6
0.37
253.4
0.36
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Troubleshooting
