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One of the safety input pairs on the Cartop SRU board is showing power on one input and
no power on the other. Safety inputs should always go on and off together. The Extra Bytes
indicate which terminals are mismatched. For example, if the Extra Bytes are 1-2 then
check inputs 501 and 502 on the Cartop SRU board.
Measure the voltage on the terminals to verify the mismatch. If both terminals show the
same voltage, the problem may be internal to the board in which case it should be
replaced.
Verify wiring is secure in both terminals.
The controller is configured with separate hall door signals for "doors closed" and "doors
locked" (e.g. swing doors). The controller has detected that the doors are showing as
locked but not closed. Check for wiring errors or jumpers on the lock inputs.
Add the value 501 to the Extra Bytes to determine the MR SRU inputs that detected the
problem. For example if the Extra Bytes are 2 and 27 the check terminals 503 and 528.
The safety hardware circuitry has detected a fault. Normally, another fault will be logged at
the same time.
There is too much noise on the PN1/PN2/PN3 wires from the machine room SRU to the
Cartop SRU.
If this fault occurs by itself, check setting of DIP switch bank B on both the Machine Room
and Cartop SRU boards.
Also verify traveler wires PN1, PN2, and PN3 are properly connected at both the car and
machine room.
Note the Extra Bytes and contact Smartrise if fault persists.
Car exceeded allowed speed for Inspection or leveling with doors open.
Maximum speed for inspection is 150 FPM or 110% of programmed leveling speed
(whichever is lower).
Maximum speed for leveling with doors open is 20 FPM or 150% of programmed leveling
speed (whichever is lower).
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