BRY-AIR DEHUMIDIFIER TROUBLE-SHOOTING GUIDELINES
- 19 -
Figure D
TROUBLE
PROBABLE FAULT
PROBABLE CAUSE
CORRECTIVE ACTION
1. Main power off.
1. Check line and main
power supply.
2. Control power off.
2. Check per item.
a. Control circuit fuse
blown.
a. Replace fuse.
b. Faulty control
transformer.
b. Replace transformer.
c. Control switch open.
c. Close or replace switch.
d. Humidistat satisfied.
d. Turn down to lower
setpoint.
Unit stopped (Both fans off)
Power and control failure
e. Faulty control elements.
e. Check and repair or
replace as req'd.
1. Blown motor fuse(s) or
tripped breaker.
1. Replace fuse or breaker.
2. Bad motor starter
contacts.
2. Repair or replace.
3. Motor overload(s).
3. Reset or replace.
4. Burned out motor.
4. Repair or replace.
Either fan off
Power or mechanical failure
5. Failures of fan drive
mechanism. (Belts set
screws, keys, etc.)
5. Repair or replace as req'd.
1. Excessive unconditioned
make-up air.
1. Reduce make-up air.
2. Leaking ducts and/or air
handling equipment
outside controlled space.
2. Seal leaks.
3. Access openings to space
not sealed.
3. Close and/or seal.
Excessive infiltration of
humid air into the controlled
space
4. Space not vapor tight.
4. Seal with paint and/or
vapor barrier.
1.Humidstat
a. Improper adjustment.
a. Readjust.
b. Out of calibration.
b. Recalibrate.
Faulty humidifier controls
c. Defective.
c. Replace.
1.Slipping fan belts.
1. Adjust or replace.
2.Excessive static pressure
loss.
2. Check per item.
a. Dirty filters.
a. Clean or replace.
b. Damper closed.
b. Reset.
c. Obstruction at inlet, outlet
or ducting.
c. Remove construction.
Unit running but humidity
rises
Inadequate process or
reactivation air flow
d. Clogged desiccant media.
(High pressure drops
across media.)
d. Remove media and
replace desiccant.
