Trane GRCA - Troubleshooting Guide - Chilled Water Cooling Coil

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MUA-SVX003B-EN
Troubleshooting Guide — Chilled Water Cooling Coil
Problem Probable
Cause
Solution
No or Insufcient
Cooling
Circulating pump
failure.
Repair or replace pump.*
Chilled water
temperature not
cool enough.
Check chiller.*
Air binding (air in
coil).
Bleed coil.
Insufcient chilled
water ow.
1. Circulating pump capacity is inadequate.*
2. System piping losses too great.
Insufcient air
ow.
1. See air blower troubleshooting.
2. Clogged coil
Air bypassing coil. Caulk safe off.
Undersized
system, demand
exceeding cooling
system capacity.
Replace system.*
Too much outside
air.
Check outside air dampers.
Water in
Conditioned Air
Exceeding coil face
velocity - 600 fpm.
Reduce unit air ow.
Drain pan p-trap
clogged.
Clean pan and p-trap.
NNoottee:: *Refer to Manufacturer’s Installation and Service Manual.
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