Tweco 38 CutMaster - Manual (Page 38)

SERVICE 5-6 Manual 0-2964
5.03 Basic Troubleshooting Guide
WARNING
There are extremely dangerous voltage and power levels present inside this unit. Do not attempt to diagnose or repair
unless you have had training in power electronics measurement and troubleshooting techniques.
A. Basic Troubleshooting: Overview
This guide covers basic troubleshooting. It is helpful for solving many of the common problems that can arise with this
system. If major complex subassemblies are faulty, the unit must be returned to an authorized service center for repair.
Follow all instructions as listed and complete each section in the order presented.
For major troubleshooting and parts replacement procedures refer to the Power Supply Service Manual for this prod-
uct.
B. How to Use This Guide
The following information will help the Customer / Operator determine the most likely causes for various symptoms.
Follow all instructions as listed and complete each section in the order presented.
This guide is set up in the following manner:
X. Symptom (Bold Type)
Any Special Instructions
1. Cause
a. Check / Remedy
Locate your symptom, check the causes (easiest listed first), then remedies. Repair as needed being sure to verify that
unit operates properly after any repairs.
C. Common Symptoms
A. AC indicator OFF
1. Switch at customer's main power panel in OFF (open) position.
a. Close main power switch.
2. Power Supply ON / OFF switch in OFF position.
a. Turn switch to ON.
3. Customer's main power line fuse(s) or circuit breaker(s) blown
a. Check main power panel fuse(s) and replace as required.
4. Actual input voltage does not correspond to voltage of unit
a. Verify that the input line voltage is correct. Refer to Section 2, Input Wiring Requirements.
5. Faulty components in unit
a. Return for repair or have qualified technician repair per Service Manual.