Manitowoc Fault Code
Free · no signupCOMM FAULT
Total function lockout or intermittent loss of one drum.
System
EPIC Network
Symptom
Total function lockout or intermittent loss of one drum.
Diagnosis & fix steps
LOGIC: Communication break between the cab and the Node controllers.
ACTION: Check the 120-Ohm terminating resistors. If the network is "silent," verify 24V power to the specific Node (1, 2, or 3).
Red Seal field insights
PRO-TIP: On these older units, the 1990s-era "Deutsch" connectors in the carbody often develop "pin fret." Give the harness a "wiggle test" while someone watches the EPIC screen.
Same code keeps coming back?
That's a program problem, not a part problem. Book a 30-minute uptime review with Grant, a Red Seal Heavy Duty Technician.
Read before you touch anything
- This is general reference information, not a repair manual. It is for trained, qualified technicians.
- Fault codes, meanings and procedures vary by model, serial number and software version. Confirm the code and the procedure against the manufacturer's service manual before acting.
- Follow the OEM service manual, torque specs and your site's safety procedures: lockout/tagout, block raised equipment, relieve hydraulic, fuel and air pressure, and let hot systems cool.
- You use this information at your own risk. Adventure Mechanical and AM Fleet Integrity accept no liability for damage, injury, downtime or loss arising from its use.
- Not affiliated with or endorsed by any manufacturer. Brand names are used only to identify the equipment a code applies to.
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