Service Home Cabinet Cooler Troubleshooting Guide
Last updated: 02/18/2021

Cabinet Cooler - Troubleshooting Guide

Cabinet Cooler Troubleshooting Guide

Control Cabinet Cooler - System Overview Video

Introduction

The cabinet cooler is attached to the CNC control cabinet door. It is an air coditioning unit that maintains the temperature inside the control cabinet ~ 20°F cooler than ambient temperature. The unit is powered by the Haas control and turns on automatically when the temperature inside the cabinet rises above 100°F.

Symptom Table

Symptom Possible Cause Corrective Action
The Cabinet Cooler does not turn ON or OFF. Blown fuse. Replace the fuse.   Make sure the fuse is a 30A 250V Glass Fast Blow.
Tripped GFCI. Reset the GFCI.
Bad thermostatic switch. Replace the Cabinet Cooler electrical assembly.
The temperature settings are not set correctly. Look through the inner chiller cover and make sure the temperature controls are set to Max Cool  and HI Cool.  On some models you may need to remove the cover to set to the knob studs to the correct position.
Not enough air flow from the Cabinet Cooler. Clogged intake filter Clean or replace the intake filter.
The temperature settings are not set correctly. Look through the inner chiller cover and make sure the temperature controls are set to Max Cool  and HI Cool.  On some models you may need to remove the cover to set to the knob studs to the correct position.
Not enough  air flow from the CABCOOL Jammed or broked fan blade Check for debris in the fan or replace the unit if it is broken
Bussing sound from AC unit Bad compressor Replace the AC unit
Condensation/leaking water AC unit is plugged into test plug/coolan chiller plug; this is not a temperature controlled operation plug Plug into designated operation side
CABCOOL is not level Make sure cabcool enclosure is level and not bent
Excessive humidity or temperature Place bucket under the cabcool enclosure
The machine shuts off when the Cabcool turns on. The CABCOOL thermal switch outlet (32-0376A) wiring is on the same phase that PSUP monitors for low voltage condition. See Cabcool Power Outlet Wiring Verification section.
The fuse blows on the power outlet bracket when the Cabcool unit starts. The incorrect fuse has been installed. Make sure the fuse is a 30A 250V Glass Fast Blow.

CABCOOL Power Outlet Wiring Verification

IMPORTANT:  Only do this for machines equipped with CABCOOL thermal switch outlet 32-0376A.

Make sure that machine incoming power system and CABCOOL have been verified.

For example, verify that machine meets the correct voltage/wire size requirements and transformer taps locations have been verified.  Refer to the Power On/Off - Main Transformer - Troubleshooting Guide.

Turn Off the Main Circuit Breaker

Remove the transformer cover.

Swap the RED and BLACK leads from the CABCOOL POWER OUTLET cable 32-0376A at the transformer 120V OUT terminals.

Power

Corrective Action:

Check the fuse [1] on the Cabinet Cooler electrical assembly. If the fuse is blown, check the Cabinet Cooler cable for damage. Replace the fuse. If the fuse blows again there is a short in the air conditioning unit itself. Replace the Cabinet Cooler unit.

Check the GFCI. Reset the GFCI if it’s tripped. If the GFCI trips again there is a short to the ground somewhere in the air conditioning unit. Check the Cabinet Cooler cable for damage. Replace the Cabinet Cooler unit.

Check the operation of the thermostatic switch. Blow at the assembly with a heat gun. If the thermostatic switch does not activate, it must be replaced. Replace the Cabinet Cooler electrical assembly if the switch is not operating properly.

Filter

Corrective Action:

The Cabinet Cooler has an intake filter [1] on the bottom of the Cabinet Cooler unit. Inspect the filter periodically. Check if the filter is clogged. Clean or replace the filter if necessary.

Temperature Control Settings

The temperature controls are set at the factory.   Make sure the temperature controls are set to Max Cool  and HI Cool.

Note: On some models you may need to remove the cover to set to the knob studs to the correct position.

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