Hofmann ATC 900, Service Manual

Page: 9 / 120

CTC-CEN Service Manual 07-13 Rev.E
9
CHAPTER 4
AC/DC POWER DISTRIBUTION
4.1 LOCKOUT AND/OR TAGOUT SYSTEM PROCEDURE
1. Notify all affected employees that a lockout or tagout system is going to be utilized and why. The authorized
employee should know the electrical power the machine uses and it’s hazards.
2. If the machine or equipment is running, shut it down by the normal stopping procedure (depress the stop button,
open toggle switch, etc.).
3. Use appropriate devices to isolate the equipment from the power source(s). Stored energy (such as that in
springs, elevated machine members, rotating flywheels, hydraulic systems, and air gas, steam or water pressure,
etc.) must be dissipated or restrained by methods such as repositioning, blocking, bleeding down, etc.
4. Lockout and/or tagout the energy isolating devices with individual lock(s) or tag(s).
5. After ensuring that no personnel are exposed, and as a check on having disconnected the energy sources,
operate the push button or other normal operating controls to make certain the equipment will not operate.
CAUTION: RETURN OPERATING CONTROL(S) TO “NEUTRAL” OR “OFF” POSITION AFTER THE TEST [DE-
ENERGIZED STATE].
6. The equipment is now locked out or tagged out.
4.2 ELECTRICAL REQUIREMENTS
NOTE: ANY ELECTRICAL WIRING MUST BE PERFORMED BY LICENSED PERSONNEL.
ALL SERVICE MUST BE PERFORMED BY AN AUTHORIZED SERVICE TECHNICIAN
.
Check on the plate of the machine that the electrical specifications of the power source are the same as that of the
machine.
NOTE: ANY ELECTRICAL OUTLET INSTALLATION MUST BE VERIFIED BY A LICENSED ELECTRICIAN
BEFORE CONNECTING THE TIRE CHANGER
.
NOTE: ENSURE THAT THE OUTLET HAS AN AUTOMATIC GROUND FAULT CIRCUIT BREAKER WITH A
DIFFERENTIAL CIRCUIT SET AT 30 MA.
4.3 AC THEORY OF OPERATIONS
Always use the “One Hand Rule” when working with AC voltages by keeping one hand in your pocket or behind
your back. Before removing wires from the tire changer, always verify that the unit is “OFF”. Turn off the Main Power
Switch on the back and unplug the AC power cord from the AC outlet.
AC DISTRIBUTION
All Easy platform tire changers are equipped by one 230 VAC three phase turntable motor.
The voltage at which the machine is wired is printed on the serial number plate and on a tag at the end of the power
cord.
The power cord has 3 wires:
N = Neutral
L1 = Phases
PE (yellow/green) = Ground
The machines can work at 50 or 60 Hertz.
The 230 (+/-10%) AC voltage comes in through a “ON/OFF” Power Switch placed on the electronic box cover and
immediately is sent via to an anti disturb filter to the Inverter and to the transformer.