Error Codes - Henny Penny MPC-1L Technical Manual

1-4. TROUBLESHOOTING (Continued)
PROBLEM
Product not holding
temperature
Red LED, when should
be green, or vice versa
Front LED does not
light

1-5. ERROR CODES

DISPLAY
"E-4"
"E-6"
"E-41"
"E-5"
Oct. 2018
CAUSE
• Heat settings too low
• Low or improper voltage
• Product held too long
• Product not placed correctly in unit
• Polarity reversed on LED wires
• Faulty LED
CAUSE
Control board
overheating
Faulty temperature
Memory scrambled
Unit over-heating;
faulty relay or
control board
Model MPC-1L, MPC-22, MPC-554
• Have heat zones set to factory default
temperatures
• Using meter, compare receptacle
voltage to data plate voltage
• Hold product for recommended time
• Push pans in completely
• Access the LED wires on side of unit
and reverse wires at wire nuts
• Access LED wires on side of unit and
check for dc voltage; if no voltage,
check for voltage at control board; if
voltage present, replace LED
PANEL BOARD CORRECTION
Turn switch to OFF position, then turn switch back
to ON; if display shows "E-4", the control board is
getting too hot; make sure unit is not overheating;
if control board is not overheating and "E-4"
persists, replace control board
Turn switch to OFF position, then turn switch back
to probe ON; if "E-6" still shows, have temperature
probe checked
Turn switch to OFF position, then turn switch back
to ON; if "E-41" still shows, have the controls
intitialized; if display still shows "E-41", replace
control board
If control board doesn't cut power to relay when the
LED is green, then replace control board; but
if control board does cut power to relay when the
LED is green, but unit continues to heat, check relay
1-4
CORRECTION
FM06-038-B