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Check Motor and Overload Status

Navigate to CURRENT COMMANDS > I/O and verify chip blaster pump run input status. Check electrical cabinet for tripped thermal overload relay.

Ensure main power is locked out before opening electrical cabinet

Test Motor Operation

Reset thermal overload if tripped. Manually activate pump through MANUAL > COOLANT menu and observe for proper motor rotation and current draw.

Normal pump current should be within nameplate specifications, typically 8-12 amps for standard Haas chip blaster pumps

Verify Feedback Circuit

Check continuity of auxiliary contacts on motor starter and wiring to NGC input card. Verify proper 24VDC signal at input terminal.

Use DIAGNOSTICS > I/O STATUS to monitor real-time input state changes

Check Coolant Tank Level

Visually inspect coolant tank level and verify it's above the low-level float switch. Check for leaks in coolant lines or tank.

Float switch should be positioned approximately 2-3 inches above tank bottom

Test Float Switch Operation

Manually lift float switch and observe input status change in CURRENT COMMANDS > I/O. Switch should show closed circuit when float is raised.

Clean float switch of debris that may prevent proper operation

Refill and Reset System

Add coolant to proper level, ensure float switch circuit closes, then clear alarm using RESET key and test chip blaster operation with M88 command.

Use only recommended coolant mixture ratios to prevent pump damage

Check Pressure Switch Setting

Locate pressure switch on chip blaster manifold and verify setting matches system requirements (typically 200-300 PSI). Check switch wiring connections.

Pressure switch should be set 50-75 PSI below maximum system pressure

Test System Pressure

Install pressure gauge at chip blaster nozzle and run system. Compare actual pressure to switch setting and verify adequate flow.

Wear safety glasses when testing high-pressure coolant systems

Inspect Filter and Restrictions

Check chip blaster filter for clogs, inspect nozzles for debris, and verify all valves are properly positioned. Clean or replace components as needed.

Remove nozzles and back-flush system to clear restrictions

Verify Input Card Status

Access DIAGNOSTICS > SYSTEM INFO and check for I/O card faults. Navigate to I/O STATUS and monitor chip blaster related inputs for proper state changes.

Input card LEDs should illuminate when circuits are closed

Test Input Circuits

Measure 24VDC at input terminals with field devices activated. Check continuity of wiring from devices to control cabinet input terminals.

Use proper lockout procedures before working on control wiring

Isolate Faulty Component

Temporarily jumper input points to isolate control vs. field device issues. Replace I/O card or repair wiring as diagnosed.

Document original wire positions before making changes

Check Valve Operation

Manually activate chip blaster through MANUAL > COOLANT and listen for valve actuation. Verify solenoid receives 115VAC when commanded.

Solenoid should produce audible click when energizing

Inspect Valve Assembly

Check valve for mechanical binding, debris, or seal failure. Verify proper air pressure if pneumatically operated valve is used.

Depressurize system before disassembling valve components

Test Electrical Connections

Verify solenoid coil resistance and check wiring connections. Replace solenoid or valve assembly if electrical or mechanical failure is confirmed.

Typical solenoid coil resistance is 10-50 ohms depending on voltage rating