Dectron, Inc. March 2012
DECTRON
Owner’s Manual
DSH/DSV/RSH/DBH/RBH Series Dehumidifier
Data subject to change without notice.
311
Diagnostics-Mechanical Service
Excessive noise
(continued)
Liquid refrigerant in crankcase
can cause excessive noise on
startup.
• Be sure that the compressor crankcase
heater is functioning. Allow at least 12
hours for the crankcase heater to warm up
before initial startup.
Unit runs continuously
(no damage will result)
NOTE: The blower is
intended to run 100% of
the time.
NOTE: Each compres-
sor has a minimum run
time of 20 minutes.
NOTE: Failure to pump
down will stop the com-
pressor and produce an
alarm message.
Set points are out of range
• Adjust set points to values shown on unit
nameplate.
Auxiliary air heating sys-
tem stays on
Relay failure
• This is indicative of a relay failure on the S5
board. Adjust the set points to be sure
there is no heating demand. Check that the
control voltage to the heating relay (see unit
wiring diagram) is zero. if heat remains on,
replace the relay.
Heavy pool use can cause the
water evaporation rate to
increase dramatically.
• Conditions will return to normal after peak
use subsides.
• Be sure the original design activity factor
has not been exceeded. This can be
changed by the addition of water features
(fountains, slides, etc.) or by changing the
number of people using the facility, or by
changing the activities the people
engage in.
Corrosion or clogging of
heat exchangers
Missing or dirty filters
• Replace as needed.
Failure of a blower bearing can
produce a rumbling noise.
• Examine blower bearing for play or loose-
ness. Replace as necessary.
SYMPTOM POSSIBLE CAUSES CHECKS & CORRECTIONS
Problems not indicated by Supervisaire
®
Controller
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