Accurex Vari-Flow Посібник з монтажу, експлуатації та технічного обслуговування - Сторінка 15

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Troubleshooting Guide
Issue
Smoke spilling out of hood
at 100% operation
Smoke spilling out when
hood running at lowest
speed
Fans do not turn up to
maximum speed
Fans do not turn down to
minimum speed
Exhaust fan on and supply
fan off
Fans rotate in wrong
direction
100% override does not
increase exhaust
Fan switch is on, but fans do
not turn on
Hood lights LED on, but no
lights come on
Fan 100% LED is flashing
Fans do not turn on
automatically
Pressure Sensor Fault
Fire
Temperature Sensor Fault
Exhaust VFD Fault
Supply VFD Fault
Possible Cause
Max fan speed has been
scaled down from 100%
Improper hood design
Fan minimum speed set
too low
Improper hood design
Dirty temperature sensor
High temperature set
too high
Dirty temperature sensor
Low temperature set
too low
Broken supply fan belt
Fire mode
VFD output wiring incorrect
Exhaust already at 100%
Bad wiring connection
Broken fan belt
VFD fault
Bad wiring connection
Light bulbs are burned out
Bad wiring connection
Vari-Flow is operating
in temperature interlock
mode
Temperature Interlock
Enabled set to no
Interlock set point too high
Kinked hose
Controlled space not
holding pressure
Fire system microswitch is
in the fire position
Dirty/burned sensor
Incorrect programming
VFD over current
Fan FLA not set in the VFD
parameters
VFD over current
Fan FLA not set in the VFD
parameters
Recommended Solution
Increase exhaust fan maximum speed to 100%.
Check hood overhang, cross drafts, or proper
make up air
Increase exhaust fan minimum speeds
Check hood overhang, cross drafts and proper
make up air
Clean grease from temperature sensor
Decrease the high temperature set point
(115°F default)
Clean grease from temperature sensor
Increase the low temperature set point
(90°F default)
Replace fan belt
Check fire contact connection
Switch any two leads on the hood side of the
VFD to the fan motor
Proper Operation
If fan 100% LED does not light check keypad
connection
Replace fan belt
Check VFD for faults
If fan on/off LED does not light check keypad
connection
Replace hood light bulbs
If hood lights LED is lit check wiring connection to
hood lights
Press the Fan On button to manually turn on the
fans
Turn the Temperature Interlock Enabled to yes
Adjust the temperature interlock set point
(90°F default)
Remove kink or replace hose
Adjust the static pressure set point
Check the fire suppression microswitch
connections
Clean/replace sensor
Check the temperature sensor settings
Check fan rotation
Check the VFD overload settings (PAR E2-01)
Check fan rotation
Check the VFD overload settings (PAR E2-01)
Vari-Flow Air Management System
15