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ErrorLib — Industrial Fault Code Library

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Bill Val ROM

Bill Acceptor ROM Checksum Error

Otis · 400 Elevator

What does Bill Val ROM mean?

Indicates a ROM checksum error within the bill acceptor, suggesting corruption of its firmware or configuration data. This can lead to validation failures or system instability for banknotes.

Common Causes

  • Corruption of the ROM (Read-Only Memory) checksum within the bill acceptor.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify the input supply voltage to the bill acceptor module against the manufacturer's specifications.

  2. 2

    Inspect all electrical connections and harnesses between the bill acceptor and the main elevator control system for integrity and secure seating.

  3. 3

    Check the diagnostic menu or event logs within the elevator's HMI or service tool for any additional fault codes related to the bill acceptor or communication.

  4. 4

    Perform a controlled power cycle of the bill acceptor module by de-energizing and re-energizing its power supply.

Browse all codes in this manual (41)
Verified technical data. Last updated: April 2026

Related Faults

Bill JamBill JamBill MotorBill Validator Motor DefectiveBill SensorBill Sensor Error
Source: Otis 400 Elevator
Open Manual (Page 21)Search more codes in this manual