Carrier Aquazone 50PCH007 Installation, Start-Up And Service Instructions Manual page 52

FAULT COOLING HEATING
X
Objectionable
noise levels
X
X
Table 30 — Troubleshooting (cont)
CHECK
Poor ductwork/grille design
Air noise
Fan speed setting too high
Unit not mounted on full
X vibration pad
Unit not connected with
Structure bourne
flexible conduit, water lines
noise
and/or ductwork
Unit cabinet touching wall or
other building component
High water temperature or low
water flow rate elevating head
pressure
Scaled or fouled water coil
Compressor noise
elevating heat pressure
Low airflow elevating head
X
pressure
X Water hammer Fast closing valves installed
POSSIBLE CAUSE
Ensure ductwork and grilles are properly sized for unit
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.
52
SOLUTION