Esco Ascent max, User And Service Manual

Page: 41 / 71

31
Ductless Fume Hoods
Fuse F1 is blown
•
Switch off the cabinet.
•
See Component Layout to locate the relay board.
•
Check Fuse F1 on relay board. See Figure 2 ‐ 1 below.
•
If fuse F1 is blown, as temporary solution, use F5 (spare) to replace F1.
•
If fuse F1 is okay, proceed to next step.
Faulty motor speed
controller
•
Switch on the blower on the cabinet.
•
See Component Layout to locate the motor speed controller
•
Adjust the knob of the speed controller clockwise to speed up the blower,
counterclockwise to lower down the blower speed.
•
If still the blower doesn't work when fully clockwise already, switch off the cabinet
and proceed to next steps below.
•
Add jumper cables between the 2 cables going to the speed control. This is
bypassing the speed controller. See Figure 2 ‐ 2/2 ‐ 3 below.
•
Switch on the cabinet.
•
If the fan operates properly, the speed controller is defective and needs to be
replaced.
•
If the fan does not operate, the problem is not with the speed controller. Please
proceed to next step.
Faulty capacitor
•
Switch the unit off.
•
See Component Layout to locate the capacitor.
•
See Figure 2 ‐ 4 below, disconnect two cables of capacitor.
•
Using a capacitance meter or a DVM set to capacitance measurement. Record the
value between two capacitor cables.
•
If the value is out of given ranges on table 1, replace capacitor.
•
If the capacitance is within the given ranges proceed to next step.
Warning: The capacitor may still have some electrical charges if the cabinet was on prior doing this
checking. Wait for 1 ‐ 2 minutes and check the capacitor voltage using a voltmeter to ensure the
capacitor was discharged (voltage less than 5VAC) prior to disconnecting the capacitor.
Figure 2 ‐ 1
Figure 2 ‐ 2 Figure 2 ‐ 3