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No Serial Communication with Drive
1. CAT5 cable not plugged into DRIVE port.
2. Smartrise drive parameter not configured for serial control of drive.
3. Jumpers on Machine Room SRU board connector J20 set for half-duplex communication on
DRIVE port.
4. Bad CAT5 communication cable.
5. Magnetek drive not configured for serial communication.
6. Bad comport on Machine Room SRU board.
7. Excessive electrical noise or bad grounding.
8. Bad Comm port on Magnetek drive.
1. Reseat CAT5 communication cable into DRIVE port.
2. Verify parameter 00-020 = xFF for Magnetek / Verify parameter 00-020 = xFC for Hydros
3. Verify there are no jumpers on Machine Room SRU board 10-pin header J20. This header is
located at top left corner of SRU board.
4. Replace CAT5 drive cable.
5. Verify Magnetek drive is configured for serial communication.
6. Replace Machine Room SRU board.
7. Be sure controller is properly grounded.
8. Replace Magnetek drive.
Car will no longer run on Automatic operation.
Use Extra Byte 1 and Extra Byte 2 to determine the reason for the fault and how to correct it.
Extra Bytes 0-2: Hydro is in a “Can’t Run Up” condition. This is a condition where it cannot run
the pump motor. This can be due to low oil, running on battery power, or having exceeded the
motor limit timer (MLT).
Extra Bytes 1-0: Car has exceeded the maximum number of Starts Per Minute.
Parameter 00-042 limits how many times the controller may attempt to run the car in a one-
minute period. If the safety logic detects too many attempts, it will take the car out of service
until the minute field on the real-time clock changes.
Extra Bytes 2-0: Car has exceeded the maximum number of Faults Per Hour.
Parameter 00-041 limits how many times the controller may fault in a one-hour period. If the
safety logic detects too many faults, it will take the car out of service until the hour field on the
real-time clock changes.
Extra Bytes 4-0: Manual reset required per TSSA code.
Extra Bytes 7-N – Where N is floor (1 = bottom): Car has gone out of service due to activation
of the HUGS infant abduction security system at a floor the car was serving.
Extra Bytes 8-8: An Out of Service input has been activated on one of the SRU boards. An out
of service input will appear under Local Inputs as [CONTROLLER, GO OOS].
Extra Bytes 9-9: The Out of Service Timer is activated and took the car out of service.
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