Unit Economizer Control (Eca) Troubleshooting; Reliatel™ Control - Trane Precedent YZC036E Installation, Operation And Maintenance Manual

Troubleshooting
Table 12. Fault detection and diagnostic codes
Mixed Air Outdoor
Temp Temp
Failures
Sensor Sensor
Fail
Damper stuck
at Minimum
Damper Stuck
Open
Mixed Sensor
X
Failure
Supply Air
Sensor Failure
Outdoor Air
Temperature
Fail
Power loss to
RTEM
Failed or Power
Loss to
Actuator
Mechanical
Failure of
Actuator
(a) If goes out of range.
Table 13. Low leak economizer sensor values
Resistance
Temp °F
40
41
42
43
44
45
46
47
48
49
50
51
52
53
Unit Economizer Control (ECA)
Troubleshooting
ReliaTel™ Control
Verify Economizer Status by Economizer Actuator (ECA)
LED indicator:
• OFF: No power or failure
• ON: Normal, OK to economize
54
Primary Fault Codes
Pressure
Economizer RTEM
Dead band
Actuator Comm
Fault Fail
Fail (If Used)
X
X
X
X
X
(K ohms) Temp °F
26.097 54
25.383 55
24.690 56
24.018 57
23.367 58
22.736 59
22.132 60
21.530 61
20.953 62
20.396 63
19.854 64
19.330 65
18.821 66
18.327 67
Temp
Sensor Airflow
Fail Sensor Fail
Fail
(If Used) (If Used)
(a) (a)
X X *
(a)
X X
(a)
X
X
Sensor Values Data
Resistance
(K ohms)
17.847
17.382
16.930
16.491
16.066
15.654
15.253
14.864
14.486
14.119
13.762
13.416
13.078
12.752
• Slow Flash: Normal, not OK to economize
• Fast Flash - 1/2 second on / 2 seconds off:
• Error Code: Communications failure
• Pulse Flash:2 seconds on / 1/2 second off:
• Error Code:
• 1 Flash: Actuator Fault
2 Flashes: CO
•
• 3 Flashes: RA Humidity Sensor
Information Code
Space Unit
Unit Fails
Press Dead Economizing
to
band Fail When It
Economize
(If Used) Should Not
(a)
X X
(a)
X
Temp °F
68
69
70
71
72
73
74
75
76
77
78
79
80
81
Sensor
2
Damper
Position %
Indicated
X
X X
X
X
X
X
Resistance
(K ohms)
12.435
12.126
11.827
11.535
11.252
10.977
10.709
10.448
10.194
9.949
9.710
9.477
9.250
9.030
RT-SVX46G-EN