Trane YSC036E - Troubleshooting; Method 2

Troubleshooting
RT-SVX21P-EN 65
After approximately 30 seconds, turn the “Mode”
selection switch to the desired mode, i.e. Heat, Cool or
Auto.
Method 2
To reset the system at the unit, cycle the unit power by
turning the disconnect switch “Off” and then “On”.
Table 16. Fault detection and diagnostic codes
Primary Fault Codes Information Code
Failures
Mixed Air
Temp
Sensor
Fail
Outdoor
Temp
Sensor
Fail
Economizer
Actuator
Fault
RTEM
Comm
Fail
Pressure
Dead band
Fail
(If Used)
Temp
Sensor
Fail
(If Used)
Airflow
Sensor Fail
(If Used)
Space
Press Dead
band Fail
(If Used)
Unit Fails
to
Economize
Unit
Economizing
When It
Should Not
Damper
Position %
Indicated
Damper stuck
at Minimum
XX
(a)
X
(a)
*X
(a)
XX
Damper Stuck
Open
XX
(a)
X
(a)
X
(a)
XX
Mixed Sensor
Failure
X X
Supply Air
Sensor Failure
XX
Outdoor Air
Temperature
Fail
X X
Power loss to
RTEM
X
Failed or Power
Loss to
Actuator
X X
Mechanical
Failure of
Actuator
X
(a)If goes out of range.
Table 17. Low leak economizer sensor values
Sensor Values Data
Temp °F
Resistance
(K ohms) Temp °F
Resistance
(K ohms) Temp °F
Resistance
(K ohms)
40 26.097 54 17.847 68 12.435
41 25.383 55 17.382 69 12.126
42 24.690 56 16.930 70 11.827
43 24.018 57 16.491 71 11.535
44 23.367 58 16.066 72 11.252
45 22.736 59 15.654 73 10.977
46 22.132 60 15.253 74 10.709
47 21.530 61 14.864 75 10.448
48 20.953 62 14.486 76 10.194
49 20.396 63 14.119 77 9.949
50 19.854 64 13.762 78 9.710
51 19.330 65 13.416 79 9.477
52 18.821 66 13.078 80 9.250
53 18.327 67 12.752 81 9.030