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HOOD SECTION - TROUBLESHOOTING SUGGESTIONS
SYMPTOM
Entire unit inoperative
No lights glow
No buzzer sounds
Cooking appliance inoperative
"POWER" light on hood ON. Vent
fan working ok with no service
Cooking appliance inoperative
"POWER" light on hood ON.
Vent fan working OK.
"SERVICE REQUIRED" light ON
Vent fan working OK, but amber
"CHECK FILTERS" light stays ON
POSSIBLE CAUSE
Unit unplugged.
Circuit breaker off or tripped
Damaged power cord
Damaged power switch
External interlock jumper loose or
damaged (unit is not connected to
building fire control system)
External interlock open (unit
connected to building fire control
system)
Contactor, wiring or connectors
damaged
Vacuum line to switch VS4
restricted
Vacuum switch VS4 open or
defective
Vacuum pickup port in plenum, or
vacuum port on blower plugged
Fire damper tripped
Grease baffle and/or filter pack
position switch(es) open
Vacuum switch VS1 open or
damaged
14
SUGGESTED REMEDY
Plug power cord into receptacle
Reset circuit breaker
Replace power cord
Check switch. Replace as req'd.
Check jumper. Repair or replace
as required
Locate and rectify open circuit
condition in building fire control
system.
Replace contactor
Repair wiring
Check for restriction in vacuum
line to switch.
Check vacuum switch VS4.
Replace as req'd.
Clean vacuum ports
NOTE: Vacuum port in plenum
may appear as a place to attach
a nozzle. Do not attach a nozzle
here. It will block the vacuum
signal (see pg 11).
Replace fire damper
NOTE: While the fusible link alone
may be replaced, once the
damper has tripped it may no
longer function reliably.
Missing or un-seated filter assy.
Reseat filter or adjust interlock
switch.
Be sure pre-filter is hooked in
position. Check for damaged
vacuum line, or one that is
disconnected at the vacuum
switch or pick-up port. Also check
port for grease contamination.
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