Trane GRAA - Optional Coil and Cooler Units; Chilled Water Coil Units; Evaporative Cooler Units

TROUBLESHOOTING GUIDE
CH I LLED WATER COOLING COIL
PROBLEM PROBABLE CAUSE SOLUTION
1 . N o or I n s uff ici ent C ool in g Ci r cul a t i ng pump f
a
i lu re . Rep a ir o r r eplace p um p .*
Ch ille d wa ter t
e
mp e r a t ur e Ch eck
c h iller. *
n o t coo l e n oug h .
2.
Water in Conditioned Air
Air b i n di ng (ai r i
n
c oil). Blee d c oil.
Insufficient chilled water flow.
a.
Circulating pump capacity is
inadequate.*
b. Sys
tem 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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