Maxi Comet Executive Exec-56-G, Instruction Manual

Page: 96 / 244

Troubleshooting Comet Executive Gas
6-4
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
Unit Does Not Start or Jog
1. Main disconnect switch is
OFF.
• Turn the main disconnect switch to ON.
2. One or more legs of the
main power source is dead.
• Test and repair as necessary.
3. Incoming power is incorrect. • Check for fluctuating or incorrect incom -
ing voltage. The power requirements are
shown on the
unit’s nameplate.
4. Main disconnect switch
fuses are blown.
• Replace any blown fuses.
• If fuses continue to blow:
-Check the wiring for a short or open
circuit.
-Replace defective component(s) as
required.
5. Drive motor thermostat
is tripped (motor is over-
heated).
• Allow motor to cool and thermostat to
reset.
• If the motor thermostat continues to trip:
-Check the wiring for a short or open
circuit.
-Check for excessive load on motor
which may cause an over current
condition.
-Replace the defective motor.
6. Inverter needs to be reset. • Reset the inverter:
-Turn power OFF at the main discon-
nect switch.
-Wait one minute.
-Turn power ON at the main disconnect
switch.
• If the fault repeats:
-Input voltage is too high or low.
-Open circuit between the inverter and
MTR2.
-Drive motor MTR2 is bad.
6.1 Electrical
TOC INDEX