Troubleshooting
62
025-9567E
Fault Possible
Cause
Pressing a keypad key causes
encoder to become
unresponsive or causes display
to show undefined character(s).
Encoder Bd. Block/Format parameter memory changed or
corrupted. This may happen if the software has been changed
in the encoder (U3- U7). Fix this problem by clearing the
block/format parameters and reprogramming them. Call the
factory for more information.
Encoder processes calls very
slowly or appears to do nothing
when it should be sending.
Encoder is in remote control and baud rate is programmed slow
(150 or 600 baud).
Instant Call stack memory has been corrupted or the EEPROM
memory on the digital bd. is bad (U5-U7). If corrupted,
the stack memory may be cleared and reprogrammed.
For further help, call the factory.
Call logging is enabled (this slows call processing).
Stack delay programming too long.
Key-up delay programming too long.
INSTANT CALL FAULT IDENTIFICATION
Listed below are some possible problems and their causes to assist in trouble shooting faults.
A particular problem could be caused by a component that may be on one of two circuit
boards in the panel. For this reason, the circuit board name of the component location is
identified and will be one of the following: Driver Bd, or Switch Bd (Instant Call panel
switch board). Remember that the encoder enclosure contains a Driver and Switch board
making up one Instant Call panel. Of course all Auxiliary Panels also contain a Driver and
Switch board to make up their Instant Call panel.
Fault Possible
Cause
Panel does nothing when
power-on. LEDs may be on or
off but do not change.
Power missing or reversed or fuse, F2, blown.
Driver Bd. supply bad (J1/P3, F2, CR2, R1, VR1).
Supply Bd. or power distribution cable bad.
Driver Bd. oscillator not operational (C7, C6, Y1, U4).
Switch Bd. display not functioning (driver operational but display
does not show it, check interconnect).
Power too low or too high.
Break level at loop input (break causes driver to be reset).
Driver Bd. reset circuit faulty (U1, U10, U9, CR5, R3, C16, U10,
U9).
Panel failed self-test.
Driver Bd. microprocessor not executing software (CR4, CR3,
RP1, U3- U7, U9, U10).
Some LEDs stay on or never
come on but panel passed self-
test.
Switch Bd. component(s) bad.
Instant Call switch or switch LED bad.
One row of LEDs are
unresponsive.
Driver Bd. circuit bad (U4, J4, J5, U9).
Switch Bd. circuit bad (P1).
One column of LEDs are
unresponsive.
Driver Bd. circuit bad (U4, J4, J5, U9).
Switch Bd. circuit bad (RP2, U2, U3, U5-U14, R1-R66).
One or more keys cannot be
detected.
Instant Call key-switch bad.
Содержание Model 25
Страница 1: ...Model 25 Programmable Encoder Product Manual 025 9567E...
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Страница 16: ...Specifications 8 025 9567E...
Страница 36: ...Operation 28 025 9567E RELAY TIMING DIAGRAM...
Страница 62: ...Auxiliary Panel Installation 54 025 9567E...
Страница 72: ...Troubleshooting 64 025 9567E...