Control Device
Replacement
Table 56. Trouble Shooting
After removing the fanboard assembly from the unit, disconnect the fan wheel/wheels from the motor shaft by loosening the Allen head setscrew on the fan wheel hub collar. Next, remove the mounting bolts holding the fan motor plate to the mounting bracket of the fanboard. Then remove the motor by sliding the fan shaft from the fan wheel hub.
During
To order control components such as relays, contactors, transform- ers, low temperature detection devices, condensate overflow detec- tion devices, differential pressure switches, sensors, control valves and actuators, contact the local Trane Service Parts Center. To order, the Trane parts center will need the unit model number (which can be found on the unit nameplate), the serial number, and the part name or ID.
Problem | Possible Cause | Remedy |
Drain pan is overflowing
Standing water in drain pan
Wet interior insulation
Excess dirt in unit
Microbial growth (mold)
Plugged drain line | Clean drain line |
Unit not level | Level unit |
Unit not level | Level unit |
Plugged drain line | Clean drain line |
Coil face velocity too high | Reduce fan speed |
Drain pan leaks/overflowing | Repair leaks |
Condensation on surfaces | Insulate surfaces |
Missing filters | Replace filters |
Filter bypass | Reduce filter bypass |
Moisture problems | See “External Insulating |
| Requirements” section |
| on page 20. |
Standing water in drain pan | See “Inspecting and cleaning |
| the drain pan” section |
| on page 90. |
127 |