265

Clear Alarm and Reset Overload

Press RESET to clear alarm 265, then manually reset the thermal overload relay button on the chip conveyor motor starter.

Ensure main power is locked out before accessing electrical components

Inspect Conveyor for Obstructions

Remove chip conveyor covers and inspect entire conveyor path for chip buildup, tangled material, or foreign objects blocking movement.

Use compressed air to blow out packed chips from tight areas

Manual Conveyor Operation Test

After clearing obstructions, manually rotate conveyor mechanism to verify smooth operation before restoring power.

Never force stuck conveyor components as this may cause permanent damage

Test Conveyor Function

Navigate to CURRENT COMMANDS > AUX FUNCTIONS and activate M31 (chip conveyor on) to test operation under no-load conditions.

Check Motor Nameplate vs Overload Setting

Compare chip conveyor motor nameplate FLA rating with thermal overload relay current setting on the motor starter.

Overload should be set to 115-125% of motor nameplate FLA

Measure Actual Motor Current

Use clamp-on ammeter to measure actual running current on all three motor phases during normal conveyor operation.

Take measurements with proper PPE in energized electrical panel

Adjust or Replace Overload Relay

If current is within normal range but relay trips, adjust overload setting or replace relay if contacts are degraded.

Mark original settings before adjustment for easy restoration

Monitor Operation Cycle

Run extended test cycle using M31/M33 commands while monitoring motor current to verify stable operation.

Motor Insulation Resistance Test

Disconnect motor leads and perform megohm test between windings and from windings to ground using 500V megger.

Minimum acceptable reading is typically 1 megohm, but check motor manufacturer specs

Check Motor Connections

Inspect all motor terminal connections for looseness, corrosion, or overheating damage at motor junction box and starter.

Loose connections can cause arcing and motor damage

Motor Bearing Assessment

Listen for unusual bearing noise and check for excessive shaft play or rough rotation when manually turning motor.

Failed bearings often cause increased mechanical load and current draw

Voltage Balance Check

Measure voltage at motor terminals during operation to verify balanced three-phase supply within 2% tolerance.

Inspect Drive Chain and Sprockets

Check conveyor drive chain for proper tension, wear, and lubrication. Inspect sprockets for wear or misalignment.

Chain should have 1-2% sag when properly tensioned

Lubricate Drive Components

Apply appropriate lubricant to chain, sprockets, and bearing points according to conveyor manufacturer specifications.

Use only recommended lubricants to avoid attracting excessive debris

Check Conveyor Alignment

Verify conveyor belt/chain tracking and alignment throughout entire conveyor length, adjusting guides as needed.

Misalignment causes binding and uneven wear patterns

Test Incremental Operation

Use JOG mode with M31 to run conveyor in short intervals, monitoring for binding or irregular operation.

Check Overload Auxiliary Contact Wiring

Verify wiring from thermal overload relay auxiliary contact to control discrete input, checking for loose or damaged connections.

Use multimeter to verify continuity when overload is reset

Test Discrete Input Function

Navigate to DIAGNOSTICS > INPUTS to monitor the discrete input state corresponding to chip conveyor overload while manually operating relay.

Input state should change when overload relay is manually tripped

Verify Control Parameter Settings

Check machine parameters related to chip conveyor monitoring to ensure proper input assignment and logic configuration.

Document original parameter values before making changes

Substitute Input Test

Temporarily jumper the input or use known good input to isolate whether fault is in field wiring or control input circuit.