Replacement Parts; Service Note - Trane GRAA Installation Operation & Maintenance

TROUBLESHOOTING GUIDE
CH I LLED WATER COOLING COIL
PROBLEM PROBABLE CAUSE SOLUTION
1 . No or I nsuffici ent C ool in g Ci rcul ati ng pump fa i lu re. Repair o r replace p um p.*
Ch ille d water te mp e rature Ch eck ch iller. *
n ot cool e noug h .
2. Water in Conditioned Air
Air b i ndi ng (ai r i n coil). Blee d coil.
Insufficient chilled water flow. a. Circulating pump capacity is inadequate.*
b. System piping losses too great.
Insufficient air flow. 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.
Exceeding coil face velocity - 600 fpm. Reduce unit air flow.
Drain pan P-trap clogged. Clean pan and p-trap.
*Refer to Manufacturer's Installation and Service Manual.
VIII. REPLACEMENT PARTS IX. SERVICE NOTE
To order Replacement Parts, please provide the fol- Due to the many configurations, options and voltage
lowing information to your local representative: characteristics available on Rooftop Packaged Units,
• Model Number
• Serial Number
• Part description and Number as shown in
Replacement Parts Literature
If further assistance is required, please contact the
manufacturer's customer service department
the information provided in this manual is somewhat
general in context. Should user or service organiza-
tion incur a problem, the nature of which is not here-
in, 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.
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