Doc150313-01
Installation and maintenance manual
www.cadexair.com
11
1010, Boulevard Lionel Boulet
1-800-461-0668
Varennes, Québec, Canada J3X 1P7
Problems and solutions
** Important
–
For your own and your staff safety, you may need to contact a qualified technician or
electrician according to the type of problem you encounter **
Problem
Causes
Possible solutions
Ventilation is not
working
Exhaust fan problem
- Verify that the disconnect is in open position
- Verify that the exhaust fan motor belts are in good
conditions and replace them if necessary
Electrical supply
problem to the exhaust
fan and components
- With a multi-meter, verify if there is electrical power
reaching the disconnect of the exhaust fan
- If not, verify if there is electrical power reaching the
magnetic starter or inverter (variable frequency drive)
- Test the motor with an ohmmeter (need an electrician
or qualified technician) and change the motor if
necessary
Problem with magnetic
starter
- Verify if the magnetic started is powered on the
primary side; if not, verify the power system of the
disconnect and the fuse on the distribution panel
(contact an electrician if needed)
-
If the magnetic started has a “Manual/Off/Auto” type
selector, put the selector in manual mode; if the
ventilation start, the problem is related to the start-up
control selector; verify electrical wiring (contact an
electrician if required)
- Verify if the overload protection is snapped in; if yes,
press on reset; adjust the overload protection to 1.15
times la motor FLA value (refer to the motor safety
plate)
- Contact a qualified technician
Problem with inverter
(variable frequency
drive)
- Verify if the inverter has power on the primary side or
if there is text on the screen; if not, verify the power
system of the disconnect and the fuse on the
distribution panel (contact an electrician if needed)
- Verify if the inverter shows an error code; verify with
the inverter
owner’s manual
for the error code and
proposed solutions
- If the inverter has power, cut the power and put it
back on; some overload faults from the electrical
network requires a reboot
- Contact a qualified technician
