MGII and MG2T GAS FRYER
SERVICE
L22-236 Rev. 2 (06/11)
7
2. Troubleshooting
2.1. Fryer Troubleshooting
Problem
Probable Causes
Corrective Actions
No power to appliance.
Check main building power supply.
Circuit Breaker tripped.
Reset circuit breaker.
Power Cord loose or not connected.
Connect power cord. Check power
cord where it enters the rear of the
fryer’s entrance box. Verify that it is
plugged all the way into the
receptacle.
Fuse, F1, blown.
Check Wire Reduction Board. If AC
Lamp is not lit check F1 fuse. If fuse
is blown, replace with a 2.5 A fast
acting fuse.
Transformer, T1, Defective.
Check and replace if defective
Computer Controller
display does not light.
Defective Controller
If AC Lamp on Wire Reduction
Board is lit, check for 24 VAC
between pins 1 and 2 on J/P 1. If
voltage is present and computer
display is not lit, controller is
defective. Check for shorts on
controller outputs prior to replacing
controller.
Computer is in Melt Cycle.
Allow time for unit to heat up.
Main gas supply is off.
Verify main gas supply is turned on.
Gas shut off valve (yellow handle) is
closed.
Verify gas shut-off valve is open,
(yellow handle is in line with the gas
line).
Gas valve is not turned on.
Turn manual gas valve to “ON”.
Quick disconnect not properly
connected.
Verify quick disconnect is properly
seated.
High temperature limit has tripped.
Reset high temperature limit. Check
and replace if defective.
Ignition Module has locked out.
Turn Fryer off and back on again to
reset ignition module. If lockout
recurs, check for proper pilot flame
and proper module operation.
Replace if defective
Computer Controller
shows “MELT” and
heats slowly, or not
at all.
Low gas pressure
Check regulated gas pressure at
burner manifold. Verify pressure
matches dataplate information.
Adjust as necessary.
Main gas supply is off.
Verify main gas supply is turned on.
Gas shut off valve (yellow handle) is
closed.
Verify gas shut-off valve is open,
(yellow handle is in line with the gas
line).
Gas valve is not turned on.
Turn manual gas valve to “ON”.
Computer Controller
shows “IGNITION
FAILURE” and
alarms.
Quick disconnect not properly
connected.
Verify quick disconnect is properly
seated.
