Cetrek Propilot 725, Руководство по установке и обслуживанию

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PRO
PILOT
725 INSTALLATION & SERVICING MANUAL
Troubleshooting Guide
The Fail Safe Watchdog is causing system power down. A fatal
fault has been detected on the Distribution Box PCB. Remove
the top cover and internal RFI shield from the Distribution Box.
Visually check that the socketed IC's (IC13 MPU, IC11 Eprom,
and IC9 PGA) are installed securely. Check for any loose material
that may cause shorts.
See 1 and 2 above.
This could occur if RF energy is being injected into the power
cables or by radiation injection into the pilot system
components at very high levels. The autopilot has been
exhaustively tested to withstand RF injection and radiation at
levels far above those considered safe to personnel. Antenna
mismatch yielding high SWR can cause dangerous conditions
and in the interest of operator safety the radio installation should
be inspected immediately.
A more normal problem to occur is that a Radio transmitter, or
other high current unit, is being supplied from the same battery
as the autopilot. When the device is operated, it may be causing
the battery voltage to drop below that required to maintain the
autopilot operation. Once power loss has occurred, the fail-safe
watchdog has been designed to power down the system
automatically. This would be particularly noticeable if the
battery had a bad cell or corroded connections. It is
recommended to supply the autopilot with power from a
different battery to the other auxiliary requirements.
This may happen very occasionally due to a momentary loss of
synchronization during power up. The self test software reports
all errors of this type to help anticipate potential problems.
Unless this happens repeatedly it is of little concern.
Normally this can be traced to a wiring error. System fault
messages are explained and action to be taken is given, in “Error
5. The autopilot
powers up but
displays System
Faults which can
be reset and do
not immediately
recur
2. The display
works momentarily
then blanks and
the system powers
down.
3. System powers
down for no
apparent reason
and cannot be
restarted
4. System powers
down when radio
Transmitter or other
RF device is keyed;
or when a device
needing current is
operated (electric
windlass, etc)