Troubleshooting
56
025-9567E
Table 16. Error Codes for Power-on Self-test
Encoder Error Code
Probable Failure Cause
Err0
Instant Call Panel(s) or Loop connection(s)
Encoder Bd: U30, U21, U26-U29, J4,
Driver Bd: U8, U1-U4, U9, J3, J1
Err1
Wrong microprocessor mode
Encoder Bd:, U19, U21,U29
Err2
Microprocessor software memory (EPROM) bad
Encoder Bd: U5-U7, U1-U4, U18,
Err3
Microprocessor temporary memory (RAM) bad
Encoder Bd: U19
Err4
Time clock board bad
Time clock Bd components
Err5
Microprocessor/Peripheral interrupts bad
Encoder Bd: U19, U8, U1, U2, P5
Err6
Digital operational memory bad
Encoder Bd: U4, U1-U3, U18, U28,
Err7
Front Panel / Relay driver I/O bad
Front Panel Bd. components / cable
Encoder Bd: U8, J2, U16-U120
Err8
Tone control I/O bad
Encoder Bd: U17, U18, J2, U1, J2, U3-U6
Err9
EEPROM parameter storage memory bad
Encoder Bd: U3, U1-U2, U4, U18, U28, or program
Enable/Disable switch, JP3, is in the wrong position
If the encoder displayed the loop error code, “
Err0
”, then one or more Instant Call panels
may have faults. If an instant call panel detects a fault within its own circuitry, it will
illuminate one or more LEDs in the right-hand key column. Table 17 describes the error
indication and the probable cause.
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