S&P JENcoFAN EO, Installation, Operation And Maintenance Manual

5

TROUBLE-SHOOTING CHART

The following is a list of common causes and corrective actions for possible problems with exhaust

hood systems. Please refer to this list prior to consulting manufacturer.

PROBLEM POSSIBLE CAUSES

CORRECTIVE ACTION

No Exhaust 
Air Flow

Exhaust fan not operating

Check circuit breaker
Check fan disconnect
Check fan belt
Check fan controls

Incorrect exhaust fan rotation

Change any two wiring leads to 3 phase motor
Check rotation arrow in fan

Incorrect Exhaust fan on hood

Ensure correct fan is on hood and wired to
correct fan controls

No Make-Up 
Air Flow

Make-up air fan not operating

Check circuit breaker
Check fan disconnect
Check fan belt
Check fan controls

Incorrect make-up air fan rotation

Change any two wiring leads to 3 phase motor
Check rotation arrow in fan

Damper closed

Ensure damper is open

Static pressure in duct system higher than 
design

Do not use flexible duct. Insure duct is as direct 
as possible from fan to hood

Filters in fan clogged

Clean filters and replace

Fire system not armed or has been activated

Ensure micro switch on fire system is wired
properly. Arm fire system

Hood Not 
Capturing 
Smoke

Dirty grease filters

Clean filters and replace

Negative pressure in kitchen space

Increase make-up air (RPM/HP)

Insufficient exhaust air flow

Increase exhaust fan (RPM/HP)

Static pressure in duct system higher than 
design

Increase exhaust fan (RPM/HP). Increase duct 
size. Ensure duct is as direct as possible from fan 
to hood.

Incorrect exhaust fan rotation

Change any two wiring leads to 3 phase motor
Check rotation arrow in fan

Insufficient overhang on appliance

Size hood for adequate overhang.
Install end curtain(s)

Fan Cycles
On And Off

Motor over-amping

Check FLA of motor and adjust
Check for correct wire size to motor

Light Globes 
Contain Water

Curb and/or duct leaking

Check curb and/or duct for leaks and seal

Grease 
Dripping From 
Hood

Hood not cleaned

Adjust cleaning schedule

Exhaust air flow too low

Increase exhaust fan (RPM/HP)

Grease 

Dripping Past 

Grease Tray

Grease tray installed upside down

Install grease tray with small portion of key hole 
in the up position