ESP EX-400 Guide de dépannage télécharger pdf (Page 15)

SECTION 4 TROUBLESHOOTING

4.1 General

DISCONNECT PRIMARY POWER AT WALL SWITCH, OR CIRCUIT BREAKER,

BEFORE ATTEMPTING INSPECTION OR WORK INSIDE OF THE POWER

SOURCE.

If the Power Source is operating improperly, the following troubleshooting information may be used to locate the source

of the trouble.

Check the problem against the symptoms in the following troubleshooting guide. The remedy for the problem may be

quite simple. If the cause cannot be quickly located, open up the unit and perform a simple visual inspection of all the

components and wiring. Check for proper terminal connections, loose or burned wiring or components, blown fuses,

bulged or leaking capacitors, or any other sign of damage or discoloration.

4.2 Troubleshooting Guide

A. Fan Not Running.

1. No input power. Check main line (customers) switch fuses.

2. Defective control transformer. Check for continuity.

3. Fan motor defective. Check motor and leads, and replace if necessary.

B. No Output.

1. No incoming three-phase power. Wall disconnect switch may be open, or fuse(s) blown.

2. Poor connections at output terminals. Tighten or replace connections.

3. Main contactor not energized:

a. Thermal overload (TS1, 2, 3, 4, or 5) device(s) tripped.

b. Contactor coil defective.

c. Missing "start" signal.

C. Low Open Circuit Voltage (O.C.V.).

Normal O.C.V. is 417 volts for a nominal 460 volt line input. If your actual line voltage is running lower, your O.C.V. will

be proportionately lower; if its running higher, the O.C.V. will be proportionately higher. Regardless of the range, so

long as O.C.V. is available it means that the main contactor (K1) is energized. However, if the voltage is approximately

300, its a sign that youre only receiving your open circuit voltage from the Main Bridge Rectifier. This indicates that

the Boost Bridge Rectifier is not supplying 417 volts.

1. Boost Bridge fuses F1 and/or F2 blown. (Fuse replacement specifications are critical -- only use 30 ampere,

250 volt, slo-blo or time-delay fuses; such as, Buss No. FNW30, Shawmut No. TRM30, or Factory

replacements.)

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 27 28

Pas de commentaire

ESP EX-400 Guide de dépannage Page 15