VEN
T
ILATOR HO
OD
14
SYMPTOM
POSSIBLE CAUSE
SUGGESTED REMEDY
Entire unit inoperative
No lights glow
No buzzer sounds
Unit unplugged.
Plug power cord into receptacle
Circuit breaker off or tripped
Reset circuit breaker
Damaged power cord
Replace power cord
Damaged power switch
Check switch. Replace as req’d.
External interlock jumper loose or
damaged (unit is not connected to
building fire control system)
Check jumper. Repair or replace
as required
External interlock open (unit
connected to building fire control
system)
Locate and rectify open circuit
condition in building fire control
system.
Cooking appliance inoperative
“POWER” light on hood
ON
. Vent
fan working ok with no service
Contactor, wiring or connectors
damaged
Replace contactor
Repair wiring
Cooking appliance inoperative
“POWER” light on hood
ON
.
Vent fan working OK.
"SERVICE REQUIRED" light
ON
Vacuum line to switch VS4
restricted
Check for restriction in vacuum
line to switch.
Vacuum switch VS4 open or
defective
Check vacuum switch VS4.
Replace as req’d.
Vacuum pickup port in plenum, or
vacuum port on blower plugged
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).
Fire damper tripped
Replace fire damper
NOTE: While the fusible link alone
may be replaced, once the
damper has tripped it may no
longer function reliably.
Grease baffle and/or filter pack
position switch(es) open
Missing or un-seated filter assy.
Reseat filter or adjust interlock
switch.
Vacuum switch VS1 open or
damaged
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.
Vent fan working OK, but amber
“CHECK FILTERS” light stays
ON
HOOD SECTION - TROUBLESHOOTING SUGGESTIONS
SV504 SvcM
anual W
V
-4H(R
W
)
