Carrier Aquazone 50PTH024 Installation, Start-Up And Service Instructions Manual page 61

FAULT COOLING HEATING
X
Objectionable
noise levels
X
X
Table 25 — Troubleshooting (cont)
CHECK POSSIBLE CAUSE
Poor ductwork/grille design Ensure ductwork and grilles are properly sized for unit
Air noise
Fan speed setting too high
Unit not mounted on full
vibration pad
X
Unit not connected with
Structure flexible conduit, water lines
Bourne noise and/or ductwork
Unit cabinet touching wall
or other building
component
High water temperature or
low water flow rate
elevating head pressure
Compressor
Scaled or fouled water coil
noise
elevating heat pressure
Low airflow elevating head
X
pressure
Fast closing valves
X Water hammer
installed
airflow.
Consult blower performance table and reduce fan speed
if possible.
Mount unit on a vibration pad.
Install unit in accordance with instructions.
Adjust unit location to avoid unit touching structure.
Increase water flow rate and/or reduce water
temperature if possible.
Clean/descale water coil.
Check filter.
Increase fan speed.
Change valves to slow-close type.
61
SOLUTION