Otis GAA21750AK3 Service Tool

This code indicates that one or more internal selftests of the LCB_II board's memory (EPROM, EEPROM, RAM) or the Remote Serial Link (RSL) did not complete successfully. A failed selftest can signify a hardware fault, leading to unreliable or non-operational system behavior for the GAA21750AK3 service tool.

This code indicates that parity errors have been detected and counted on the Remote Serial Link (RSL) during the RS test. The '000' value suggests that the counter has registered parity errors, which can affect the integrity of communication with remote stations interacting with the LCB_II.

This event log entry indicates a parity error occurred on the Remote Serial Link (RSL) at address '0400'. This error signifies data corruption during transmission over the RSL, which can lead to unreliable communication with remote stations and potential system blocking for the LCB_II.

This blinking event message indicates that both Limit Switch 1 (1LS) and Limit Switch 2 (2LS) are simultaneously in an operated state, blocking elevator movement. This condition is typically indicative of an abnormal car position or a wiring fault within the OTIS 2000 Controllers MCS120/MCS220 system.

This blinking event message indicates that the Anti Creeping Switch (ACS) is in an operated state, which has blocked the elevator. The ACS is a safety device designed to prevent unintended movement of the car when it is at a landing.

This blinking event message indicates that the safety check for Limit Switch 1 (1LS) or Limit Switch 2 (2LS) has failed, blocking elevator operation. This fault implies a critical issue with the limit switch integrity or its monitoring circuit on the OTIS 2000 Controllers MCS120/MCS220.

This blinking event message indicates that the elevator is in 'Leave Top of Car' function mode, and its operation is currently blocked. This mode is typically used for maintenance or specific operational requirements, and the blocked status prevents normal elevator movement.

This blinking event message indicates that the Door Check Sequence (DCS) for the OTIS 2000 Controllers MCS120/MCS220 has not yet been performed or is not fully operational, consequently blocking elevator movement. The DCS is a critical safety verification for hoistway door contacts.

During the Door Check Sequence (DCS), the DW (Door Closed) safety contact at the specified level did not register as closed when required. This indicates that the elevator door is not fully secured, posing a safety risk and preventing normal operation of the OTIS 2000 Controllers MCS120/MCS220.

During the Door Check Sequence (DCS), the elevator door failed to close correctly or completely at the specified level. This error indicates an issue with the door closing mechanism, preventing the completion of the DCS and normal elevator operation for the OTIS 2000 Controllers MCS120/MCS220.

During the Door Check Sequence (DCS), the elevator door failed to open correctly or completely at the specified level. This error prevents the continuation of the DCS and normal elevator operation, indicating an issue with the door opening mechanism on the OTIS 2000 Controllers MCS120/MCS220.

A failure was detected in the Door Check Sequence (DCS) specifically related to the front door at a reported level (e.g., Level 01). This error indicates that the front door's operation or its associated safety contacts did not pass the automated check, blocking the OTIS 2000 Controllers MCS120/MCS220 elevator.

A discrepancy in the elevator car's position was detected during the Door Check Sequence (DCS) at a specific level. This error indicates that the LCB_II control system's perceived car position does not match the actual physical position, affecting safety and sequence execution for the OTIS 2000 Controllers MCS120/MCS220.

A failure was detected in the Door Check Sequence (DCS) specifically related to the rear door at a reported level. This error indicates that the rear door's operation or its associated safety contacts did not pass the automated check, blocking the OTIS 2000 Controllers MCS120/MCS220 elevator.

The Door Check Sequence (DCS) was intentionally terminated by the user pressing the ENTER key on the GAA21750AK3 service tool. This is a user-initiated action and not an equipment malfunction, but it prevents the completion of the safety sequence for the OTIS 2000 Controllers MCS120/MCS220.