DA2 Series Dehumidifier Owners Manual
Operation Diagnostics
34 Dectron, Inc. November 2009
Data subject to change without notice.
If the refrigerant sight glass is empty or has
bubbles after 10 minutes of compressor
operation, a qualified person should check the
charge and add refrigerant as necessary.
low refrigerant charge
PROBLEM POSSIBLE CAUSES CHECKS & CORRECTIONS
condenser pressure too
high
air flow rate too low
Measure and adjust as specified on nameplate.
condenser pressure too
low
relative humidity of return air too
low
Adjust the humidistat to normal.
unit is noisy
unit not mounted on vibration
pads
Install pads as discussed in Installation.
ducts not installed with flexible
sections
Install flexible duct sections as discussed in
Installation.
loose belt or pulley
Check blower drive and correct necessary.
blower-bearing failure
Check and replace as necessary.
liquid refrigerant in compressor
Be sure refrigerant is not flooding back to the
compressor.
Be sure the compressor crankcase heater is
working.
air flow rate too low
Measure and adjust as specified on nameplate.
return-air temperature too high
Do not operate above 80°F (27°C).
clogged condenser
Contact Dectron for cleaning suggestions. Do
not operate for any length of time without all air
filters in place.
restricted manual valve (if any)
Fully open all manual valves.
restricted refrigerant filter-drier
Replace filter-drier as necessary.
non-condensable gases in
refrigeration system
A qualified person should examine and correct
as necessary.
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