Trane TR-SCS Series - Recommended Maintenance; Monthly; Semi-Annually; Annually

Symptoms Probable Cause Recommendation
Unit Fails to Start
Incorrect phasing or voltage
Correct phase or voltage input
Power failure
Check power source, power input and fuses. Check control
cables and co
nnections.
Overload protection tripped
Check pressure/temperature operating switches and
motor.
Replace as needed.
Control is Erratic Wiring improperly connected or broken Check wiring against schematic diagram
Condenser Head Pressure
Too High
Low con
denser airflow. (Indic
ated by excessive warm
air leaving the condenser fan).
Open air passages. Clean coil. Check condenser fan(s)
Overcharge of refrigerant Reclaim excess refrigerant from system
Condenser fan not operating
Check main voltage power source to unit.
Check fan motor, contractor, fan cycling switch or fan
speed contro
ller.
Check pressure/temperature operating switches and
motor. Re
place if needed.
Condenser Fan not
Operating
Non-cond
ensable gas or air in the system
Reclaim system, pull 500-micron vacuum and recharge.
Install new drier/strainer.
Condenser Head Pressure
Too Low
Loss of refrig
erant (indicated by bubbles in sight glass) Locate and repair leak. Recharge system
Condenser fan controls not set properly Adjust or repair controls
Head Pressure Too High
Low condenser airflow. (Indic
ated by excessive warm
air leaving the condenser fan).
Open air passages
Clean coil
Check condenser fan(s)
Air or other non-condensable gas in system Reclaim system and recharge. Install a new drier strainer.
Overcharge of refrigerant Reclaim excess refrigerant from system
Condenser fan not on
Check main voltage power source to unit.
Check fan, contactor, fan cycling switch or fan speed
controlle
r.
Erratic Fan
Operation Dirty or blocked condenser coil Clean coil or remove blockage
Maintenance
SS-SVX006C-EN 27
Recommended Maintenance
Monthly
1. Check for filter cleanliness.
2. Inspect fan rotation.
3. Have the drain open.
4. Check for condensate pan safety
and switch operates
free.
5. Clean coils and clear obstructions.
6. Check chilled water/hot water circuits fo
r air (bleed as
required).
7. Ensure humidifier cylinder and controls operate
properly
.
Semi-Annually
1. Ensure tighten electrical connections.
2. Check contacts on contactors for pitting.
3. Heat/Reheat operational.
4. Clean unit as necessary and clean
coils.
5. Clean condensate pump.
6. Inspect and clean CW screen.
Annually
1. Inspect chilled water system for leaks and corrosion.
2. Conduct a complete check of all services listed
abovea
nd clean the interior of the units.