Tweco HMC-410 - Manual (Page 63)

HMC-410
May 5, 2005 5-1
SECTION 5:
SERVICE
5.01 Maintenance
The HMC-410 requires periodic maintenance to maximize
its life. The frequency of repairs given should be used as
a guideline, and in some situations may need to be
accelerated.
WARNING
Before attempting any maintenance, turn off
the controller and remove fuses of disconnect
switch supplying the power source with AC
line power.
5.02 Controller Maintenance
Every Day: check all cables, leads, and hoses for cuts or
other damage. Repair any damage immediately to prevent
shorts and further damage.
Once a Week: check the tightness of all electrical
connections. If arcing has occurred at any connection,
recondition the connection and securely refasten.
Every Six Months (more often if located in an excessively
dirty environment): use clean, dry, compressed air of not
over 25 PSI (172 kPa) to clean the control box internal
components.
5.03 Troubleshooting
These troubleshooting instructions are given as an aid to
the user. In case of trouble, it is helpful to have a set of
instructions suggesting where to look. This may save
everyone involved time and resources if the problem can
be resolved on site. Certain problems may not be
resolvable on site, and it is also helpful to know this.
This section is divided into two areas: a troubleshooting
guide and the controller diagnostics. The troubleshooting
guide will state the problem and provide a list of items to
be checked. In isolating the problem, the controller
diagnostics may be of help. These diagnostics will give
the troubleshooter absolute control over the HMC-410
control panel’s interfaces.
WARNING
Interconnecting cables must be disconnected
before the execution of any diagnostic; the
controller interfaces will be active during the
diagnostic execution which could result in
uncontrolled activation of the power source,
fixture, and feedhead.
WARNING
Disconnecting the controller interconnecting
cables will expose the connector pins which
may contain lethal voltage levels (115 VAC).
The diagnostic procedures should be
attempted only by qualified service personnel.
CAUTION
Extreme care must be used when handling
the PC boards. Static discharge will damage
PC board components. A grounded wrist strap
should be used at all times when handling the
PC boards. Storage and shipment of PC boards
should be done in antistatic packaging.
WARNING
Opening the HMC-410 control panel will
expose lethal voltage levels (115 VAC).
Disconnect all cables from the control panel
before servicing. Troubleshooting and service
should be done only by a qualified service
technician.