Troubleshooting; Fryer Troubleshooting - Pitco MGII Service Manual

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MGII and MG2T GAS FRYER

2.1. Fryer Troubleshooting

Problem
Computer Controller
display does not light.
Computer Controller
shows "MELT" and
heats slowly, or not
at all.
Computer Controller
shows "IGNITION
FAILURE" and
alarms.

2. Troubleshooting

Probable Causes
No power to appliance.
Circuit Breaker tripped.
Power Cord loose or not connected.
Fuse, F1, blown.
Transformer, T1, Defective.
Defective Controller
Computer is in Melt Cycle.
Main gas supply is off.
Gas shut off valve (yellow handle) is
closed.
Gas valve is not turned on.
Quick disconnect not properly
connected.
High temperature limit has tripped.
Ignition Module has locked out.
Low gas pressure
Main gas supply is off.
Gas shut off valve (yellow handle) is
closed.
Gas valve is not turned on.
Quick disconnect not properly
connected.
L22-236 Rev. 2 (06/11)
Corrective Actions
Check main building power supply.
Reset circuit breaker.
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.
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.
Check and replace if defective
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.
Allow time for unit to heat up.
Verify main gas supply is turned on.
Verify gas shut-off valve is open,
(yellow handle is in line with the gas
line).
Turn manual gas valve to "ON".
Verify quick disconnect is properly
seated.
Reset high temperature limit. Check
and replace if defective.
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
Check regulated gas pressure at
burner manifold. Verify pressure
matches dataplate information.
Adjust as necessary.
Verify main gas supply is turned on.
Verify gas shut-off valve is open,
(yellow handle is in line with the gas
line).
Turn manual gas valve to "ON".
Verify quick disconnect is properly
seated.
SERVICE
7