Carter-Hoffmann BR1000 User Manual
Page 11
11
TROUBLESHOOTING SUGGESTIONS
PROBLEM
PROBABLE CAUSE
POSSIBLE REMEDY
No power to unit,
No light on display
Motor not running
Not plugged in or circuit breaker
off or tripped
Plug into receptacle.
Reset circuit breaker,
check facility circuit breaker
Main switch damaged
Check main power switch,
replace if damaged
Damaged power cord
Replace cord
Hi-limit safety tripped
Allow unit to cool, hi-limit will
reset automatically, or replace
Unit does not hold temperature Damaged door gasket
Replace gasket
Damaged door latch
Replace defective latch
Temp probe damaged
Replace probe
Door gap, out of alignment
Adjust door hinging and strike
Unit does not heat
Cabinet temp above setpoint
(setpoint too low)
Turn thermostat setpoint up
Check thermometer calibration
Damaged wiring
Repair wiring
Damaged relay
Replace relay
Damaged controller
Replace controller
Damaged heating element
Perform ohm reading,
Replace element
Unit overheats
Setpoint too high
Change setpoint
Thermostat damaged
Replace thermostat
Defective hi-limit control
Replace hi-limit
Blower fan jammed
Find source of fan binding
Damaged fan motor
Replace motor
Blower fan jammed
Find source of fan binding
Relay is “chattering”
Check proper wiring to switch
Repair wiring or replace switch
Blower motor not running