Middleby Marshall PS540 - Manual (Page 33)

SECTION 3
OPERATION
29
Display
Shows the Set Point
or the Actual Tem-
perature in degrees
Fahrenheit (F) or
Celsius (C).
"SP LOCK"
Light
Lights when the
set point is locked
out from changes.
This setting can
only be changed by
service personnel.
OVERTEMP
Light
Lights when the oven
temperature is
greater than 650°F
(343°C). Refer to
Quick Reference:
Troubleshooting in
this section.
Temperature
Key
Press this key once
to view the Actual
Temperature in the
Display.
Unlock Key
Press this key
together with the Set
Point Key to allow the
Set Point to be
changed. Changes
can only be made for
60 seconds.
Up Arrow and Down
Arrow Keys
Press these keys to
adjust the Set Point up or
down. If the Set Point will
not change, refer to Set
Point Key and Unlock Key
in this section.
Set Point Key
Press this key
together with the
Unlock Key to allow
the Set Point to be
changed.
Changes can only be
made for 60 sec-
onds.
Service Key
Service use
only.
"ACTUAL TEMP"
Light
Lights when the Actual
Temperature is shown
in the display.
"SET PT"
(setpoint)
Light
Lights when the
set point is shown
in the display.
"HEAT ON"
Light
Lights when the
burner is in
operation.