Maxi Comet Executive Exec-56-G, Instruction Manual

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Troubleshooting Comet Executive Gas
6-8
WARNING
Only trained personnel with experience
in gas, electrical or mechanical repair
should troubleshoot and repair the unit.
Troubleshooting
WARNING
Read the REPAIR chapter and make
sure that the power is disconnected
before doing any repairs.
ISSUE POSSIBLE CAUSE SOLUTION
NOTE: Several drive trains are used on the machine. They share common features and can be diagnosed us-
ing the information below. Check the components for the particular drive train being troubleshot.
Drive System Mechanical or
Electrical Error
1. Chain loose or broken. • Check the chain.
• Adjust or replace; refer to
Drive Chain
Tension Adjustment on page 7-23 .
2. Mechanical component
loose, misaligned or bro-
ken.
• Check that sprocket is properly secured
to shaft:
-Tighten setscrews as necessary.
-Replace shaft key as necessary.
-Replace roll if shaft damaged.
-Check to see if sprocket is missing
teeth. Replace.
• Check and correct any alignment errors.
Replace any component that does not
work smoothly and quietly after align-
ment.
3. An inverter, motor protector
or motor thermal overload
has tripped.
• For inverter problem, turn machine off
for one minute.
-For motor protector, reset tripped
device.
-For thermal overload, motor must be
allowed to cool until automatic reset.
4. There is an open some-
where in the motor circuit or
a component is defective.
• Check for an open connection in one of
the wires on a 3-phase motor.
• Check for an open connection between
motor and inverter or motor protector.
• Check for an open connection between
the contactor and inverter or motor
protector.
• Check for defective component such as
contactor or motor protector and replace
if necessary.
• Inverter fault. Call factory for service.
• Motor is defective and needs to be
replaced.
TOC INDEX