Troubleshooting
5-4 Manual # 42-02-2P24
ATD INPUT FAILURE
Description: The Top Down Access (ATD) switch is at 120VAC when the 2HA bus is low.
Troubleshooting:
1. Check for incorrect wiring or short on the HC-CTL board ATD input and 2HA or 2 bus.
2. Check the top access switch and associated wiring per the job prints.
ATTENDANT SERVICE OPERATION
Description: The car is on attendant operation. The attendant service input (ATS) is activated.
Troubleshooting: In Program Mode (F1), check to see if any spare inputs are programmed as ATS, then
check to see if that input is activated.
ATU INPUT FAILURE
Description: The Top Up Access (ATU) switch is at 120VAC when the 2HA bus is low.
Troubleshooting:
1. Check for incorrect wiring or short on the HC-CTL board ATU input and 2HA or 2 bus.
2. Check the top access switch and associated wiring per the job prints.
BATTERY BACKUP POWER SYSTEM FAULT
Description: The battery powered rescue system has reported a fault.
Troubleshooting:
1. Check the display or fault indicators on the battery backup system.
2. Correct the cause of the fault.
3. If in error, review job prints. Check status of relevant inputs and outputs.
BATTERY POWER CAR RECALL ACTIVATED
Description: Commercial power is not available at the elevator and a battery powered rescue device is
recalling/moving the car to an appropriate floor for passenger egress. This may also be displayed during a
test operation of the battery powered rescue device.
Troubleshooting: If in error:
1. Check status of commercial power to elevator.
2. Check proper operation of the battery powered rescue device.
3. Review job prints. Check status of relevant inputs and outputs.
BOTTOM ACCESS SW. FAILURE
Description: The Up and Down Bottom Access switch inputs are active at the same time.
Troubleshooting: Check the wiring and the switch associated with the ABU and ABD inputs.
Table 5.1 Status and Error Messages
Scrolling Message - Special Event Message
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