Greensource CDi Series SM
Greensource CDi Series SM Model8733819578 (2019/02)
52 | Unit Troubleshooting
Subject to change without prior notice
Unit Noise Troubleshooting
Table 12 Unit Noise Troubleshooting
Problem Mode Check Possible Cause Action
Cooling Heating
OBJECTIONABLE
NOISE LEVELS
X X
Air noise
Poor ductwork/
grill design
Ensure the ductwork and
grills are properly sized
for the unit air flow.
Fan speed setting
too high
Consult blower
performance table and
reduce fan speed if
possible.
Structure-
bourne noise
Unit not mounted
on full vibration
pad
Mount unit on vibration
pad. See “Mounting
Vertical (VT) Units” on
page #16.
Unit not
connected with
flexible conduit,
water lines, and/or
ductwork
Install unit in accordance
with the instructions on
page #8 through page
#27.
Unit cabinet
touching wall or
other building
components
Adjust unit location to
avoid unit touching
structure.
X
X
Compressor
noise
High water
temperature or
low water flow
rate elevating head
pressure
Increase water flow rate
and/or reduce water
temperature if possible.
Scaled or fouled
water coil
elevating heat
pressure
Clean/descale water coil.
Low air flow
elevating head
pressure
Check filter.
Increase fan speed.
X
X Water hammer
Fast-closing valves
installed
Change valves to
slow-close type.
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