Trouble Shooting
Checklist
!WARNING
Hazardous Service Procedures!
The maintenance and trouble shooting procedures recommended in this section of the manual could result in exposure to electrical, mechanical or other potential safety hazards. Always refer to the safety warnings pro- vided throughout this manual concerning these procedures. When possible, disconnect all electrical power including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. When necessary to work with live electrical components, have a qualified licensed electrician or other individual who has been trained in handling live electrical components per these tasks. Failure to follow all of the recommended safety warnings provided, could result in death or serious in- jury.
If operating difficulties are encountered, refer to page 31 and 32 for probable causes and corrective measures. If suggested corrective measures have been taken, and the trouble still persists, contact the control supplier or the local Trane Sales Of- fice.
Problem | Heating Cooling Cause | Correction |
Room too warm
(outside air temperature is below 35° F)
X | Main power off | Check fuses | |
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X | Room sensor is not properly set | Reset room sensor temperature | |
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| Room sensor is providing a false reading due | Start the | |
X | to walls being cold from the night temperature | morning to provide appropriate time- | |
| setting. | frame to increase room temperature prior | |
| to space occupation. | ||
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| Sensor is mounted on a block wall that is |
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X | leaking cold air into the room through the | Relocate sensor. | |
| mounting holes. |
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| Replace malfunctioning component, or | |
X | Face and bypass damper, or coil valve is | contact the control’s contractor, or if Trane | |
malfunctioning. | controls, see | ||
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| information concerning Tracer™ controls. |
| X | Room sensor is not properly set | Reset room sensor temperature |
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| Replace malfunctioning component, or |
| X | Face and bypass damper or coil control valve | contact the control’s contractor, or if Trane |
| controls, see | ||
Room too warm |
| is malfunctioning. | information concerning Tracer™ controls. |
(outside air temperature is above 35° F) |
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| X | OA damper is in the closed position | Ensure OA damper is in the open |
| position. | ||
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| X | Clogged filter | Replace filter |
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| X | Control valve is malfunctioning | Check flow of hot water through the |
| control valve. | ||
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| Check the boiler reset schedule to |
| X | Boiler | determine if the loop temperature can be |
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| decreased. |
Room too warm | X | Steam | Check the operation of the control valves |
(outside air temperature is above 35° F) |
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| The economics of the unit ventilator | |
Unit utilizes Wall Fin auxiliary radiation: |
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| selection dictate that, in most cases, the |
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| unit will be sized to provide adequate |
| X | Outside air temperature is above 60 to 65° F | natural (ventilation) cooling without |
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| outside temperatures up to |
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| Above this point, a changeover should be |
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| made to the mechanical cooling cycle. |
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31 |