High Pressure Flood Coolant (HPFC) - Troubleshooting Guide - NGC

Introduction

The HPFC is an option that replaces the standard coolant. The HPFC can be paired with TSC and TSC ready machines, but cannot be paired with a VFD.

Within recent years, Haas Automation has made design updates to the HPFC. To identify which generation you are dealing with, look for the following key identifying features below.

1st Generation [A]:

Coolant flows through hose [1] surrounded by a spring [2]

2nd Generation [B]:

Coolant flows through PVC pipes [3] with no spring

Symptoms Table

Symptom	Possible Cause	Corrective Action
The O-ring in the filter casting is pushed out causing coolant to leak or spray out of the top cover	The filter cover was not replaced when installing/upgrading to HPFC	Replace the filter cover follow the Filter Cover Replacement section
Excessive noise from the HPFC coolant pump.	The coolant nozzles valves are closed.	Makes sure all the coolant nozzle valves are open. If not, HPFC can be noisy at normal conditions. Measure the noise with a DB meter at: the front of the machine when sliding doors open/closed and the back of the machine 3 ft away from the pump.
	Low coolant levels.	Check coolant levels and refill as necessary.
	There is an alignment problem due to the pump not properly seated.	Loosen and re-tighten the standoffs supporting the pump. Refer to the Standoff Alignment section below for more information.
	Gear pump coupler misalignment.	Order kit 93-4195 Coolant Gear Pump Coupler Conversion Kit. Follow the Pump Head Coupling - Flexible Coupling Replacement procedure. If noise persists, replace pump head.
Low coolant flow, the pump cavitates (cavitation sounds like heavy grit in the pump head, or a suction sound) or is otherwise noisy.	1st Generation Only: The pick-up hose can kink when the pump is running.	Replace the pick-up hose with the new version with a spring.
	Low coolant levels.	Check coolant levels and refill as necessary.
	Gear pump coupler misalignment.	Order kit 93-4195 Coolant Gear Pump Coupler Conversion. Follow the Pump Head Coupling - Flexible Coupling Replacement procedure. If noise persists, replace pump head.
Pressure loss is observed	The pressure relief set screw may have fallen out	Reinstall the set screw adding blue Loctite on it as well. See Pressure relief adjustment section on how to properly replace the set screw.
Pressure loss is observed	2nd Generation Only: The PVC plumbing has come undone.	Reassemble plumbing. If plumbing is having issues staying intact, use PVC glue from any hardware store to keep plumbing from coming undone.
HPFC pumps from July to December of 2020 lose functionality after a software upgrade.	The HPFC pump needs to be upgraded to match the current production HPFC pumps.	Order kit 93-1000705 STD TO HPFC FIELD INSTALL KIT ALL MACHINES, follow the High Pressure Flood Coolant (HPFC) - Installation procedure.
No coolant flow or pump motor running backwards.	Incorrect power phasing - the pump motor is running backward.	Check the phasing indicators and change the incoming power cables, if necessary.
The 230V system does not turn ON and the red LED on the motor drive PCB is OFF.	The jumper on the motor drive PCB is incorrectly located or defective.	Make sure that the motor drive PCB has a jumper installed on P3 inbetween pin 1 and 2 (the bottom two pins).
	There is no 12V input power.	Make sure that the 12V input power is connected to P2 on the motor drive PCB.
Machine coolant hose leaks at the fittings or the hose pops off the fittings.	1st Generation Only: The 5/8" Hose Clamp PN: 59-1524 installed on the coolant hose is oversized and does not clamp the hose correctly.	Replace the oversized hose clamp with PN: 59-2107 HOSE CLAMP EAR 20.1 - 23.3 MM. Use a crimping tool to secure the new hose clamp.

Filter Cover Replacement

If the O-ring [1] was pushed out of position replace the original filter cover [2] with the new thick filter cover [3]. IF the O-ring is damaged replace the O-ring.

Replace the coolant filter cap [1] with the new one [2] as shown.

If the set screws do not have a hex port for an allen key, use two jam nuts (5/16"-18) and back the set screws out of the filter housing about 0.70" (17.7mm).

Note: You may need to apply some heat to loosen the Loctite from the set screws.

Standoff Alignment

Remove the side panel covering the pump in order to access the standoffs.

Loosen the (x4) standoff bolts.

Re-tighten the (x4) standoff bolts.

Run the pump while listening for excessive noise.

Pressure Relief Adjustment

Only applicable for 1st Generation:

1. If your flow appears low, tighten set screw 1/8 of a turn at a time until you've reached a desired flow at the spindle coolant manifold.

NOTE: Only adjust the set screw 1/8 of a turn at a time. If it is fastened all the way, the flow could be so strong that it could blow a hose off the machine or the lid off the filter.

2. With the pump running, close the valve on the hose assembly and observe the pressure on the valve

3. Remove the pump from the tank. Adjust the set screw to adjust the pressure, the pressure range is from 170-210 PSI. If the set screw gets adjusted, check the blocked pressure at the pump outlet and make sure it doesn't exceed 200 psi.

NOTE: Tightening the screw will increase pressure, loosening will decrease pressure.

IMPORTANT: Make sure to add blue Loctite to the set screw

Incorrect Input Power-Phasing

The power supply PCB has a phase detect with neon indicators on the top center portion of the board. Make sure that the electrical power is phased correctly:

Green Light: The incoming power is phased correctly.
Orange Light: The incoming power is incorrectly phased.
Both Lights: A phase is missing (there is a loose cable in the system).

If the electrical power is phased incorrectly:

Set the main circuit breaker on the machine to the OFF position.

Lock the main circuit breaker. Use an approved lock with an approved safety tag.

Swap the #74 and #75 incoming power cables at the main transformer.

Kinked Pick-up hose

Only applicable for 1st Generation:

The pick-up hose can kink when the pump is running. Replace the pick-up hose with the new version with a spring.