Sterling RT - Manual (Page 26)

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TROUBLESHOOTING GUIDE – CHILLED WATER COOLING COIL
PROBLEM PROBABLE CAUSE SOLUTION
1. No or Insuffi cient Cooling Circulating pump failure. Repair or replace pump.*
Chilled water temperature Check chiller.*
not cool enough.
Air binding (air in coil). Bleed coil.
Insuffi cient chilled water fl ow. a. Circulating pump capacity is inadequate.*
b. System piping losses too great.
Insuffi cient air fl ow. a. See air blower troubleshooting.
b. Clogged coil
Air bypassing coil. Caulk safe off.
Undersized system, demand Replace system.*
exceeding cooling system capacity.
Too much outside air. Check outside air dampers.
2. Water in Conditioned Air Exceeding coil face velocity - 600 fpm. Reduce unit air fl ow.
Drain pan P-trap clogged. Clean pan and p-trap.
*Refer to Manufacturer’s Installation and Service Manual.
VIII. REPLACEMENT PARTS
To order Replacement Parts, please provide the following
information to your local representative:
• Model
Number
• Serial Number
• Part description and Number as shown in Replacement
Parts Literature
If further assistance is required, please contact the manu-
facturer’s customer service department
IX. SERVICE NOTE
Due to the many confi gurations, options and voltage
characteristics available on Rooftop Packaged Units, the
information provided in this manual is somewhat general
in context. Should user or service organization incur a
problem, the nature of which is not herein, we urge you to
contact the manufacturer. It would be of great assistance
to us if you can provide the model and serial numbers and
the wiring diagram number, as well as the access type.
X. LIMITED WARRANTY
All components are warranted by the manufacturer to be free from defects in material and workmanship for period
of one (1) year from the date of shipment from the manufacturing plant.
The manufacturer will repair or replace, at its option, any component which, upon inspection, it fi nds to be defective,
provided that the Rooftop Packaged Unit has been operated within its listed capacity, has been installed in
accordance with all furnished instruction, has not been misused or subjected to neglect and has received reasonable
and necessary maintenance. This warranty does not cover labor costs or other costs incurred in repairing, removing,
installing, servicing or handling of parts or completed products.
This Warranty does not cover loss due to corrosion by chemicals precipitated in the air such as halogenated
hydrocarbons. The manufacturer will in no event be liable for incidental or consequential damages of any kind
whatsoever.
Written permission is required prior to the return of defective components. All returns must be sent with all
transportation charges prepaid to the plant designated in the written permission. This warranty is extended only
to the original owner of the Rooftop Package Unit.