Troubleshooting
6-72 Manual # 42-02-7223
Sheave Brake Drop Fault, SHEAVE BRAKE DROP FLT
Description: The sheave brake was disabled via Sheave Brake Enable output, but the Sheave Brake Monitor
input was high. There is a five second delay before fault is generated.
Car Reaction: Emergency stop: Motor contactor and brake contactor immediately dropped. All calls are can-
celled. The doors will cycle.
Troubleshooting:
1. Verify that the Sheave Brake Monitor input and Sheave Brake Enable output have been programmed
(Configuration > I/O Boards > Configuration tab).
2. Check the voltage at the Sheave Brake Monitor input and the internal representation via the View button
on the Configuration > I/O Boards > Configuration tab.
3. Check the voltage at the Sheave Brake Enable output and the internal representation via the View button
on the Configuration > I/O Boards > Configuration tab.
4. Check the sheave brake mechanism and circuitry.
Sheave Brake Pick Fault, SHEAVE BRAKE PICK FLT
Description: The sheave brake was enabled via Sheave Brake Enable output, but the Sheave Brake Monitor
input was low. There is a five second delay before a fault is generated.
Car Reaction: Emergency stop: Motor contactor and brake contactor immediately dropped. All calls are can-
celled. The doors will cycle.
Troubleshooting:
1. Verify that the Sheave Brake Monitor input and Sheave Brake Enable output have been programmed
(Configuration > I/O Boards > Configuration tab).
2. Check the voltage at the Sheave Brake Monitor input and the internal representation via the View button
on the Configuration > I/O Boards > Configuration tab.
3. Check the voltage at the Sheave Brake Enable output and the internal representation via the View button
on the Configuration > I/O Boards > Configuration tab.
4. Check the sheave brake mechanism and circuitry.
Shuttle Service Activated, SHUTTLE SERVICE ON
Description: Indicates that Shuttle service has been activated via key-switch/input, software command or
timer.
Shuttle Service Deactivated, SHUTTLE SERVICE OFF (see Shuttle Service Activated).
Silent Mode Activated
Description: Indicates that Silent mode has been activated via Activate button (Controller > View > Configu-
ration > Car Operation > Devices tab), timer (System > Configuration tabs > Timer Tables) or iMonitor.
Silent Mode Deactivated (see Silent Mode Activated).
Single Channel QUAD Fault, SNG CHANNEL QUAD FLT
Description: This fault indicates the failure of one of the two landing system quadrature signals (DP1 or
DP2).
Car Reaction: Emergency stop: Motor contactor and brake contactor immediately dropped.
Troubleshooting:
1. Check DP1 and DP2 wiring from the landing system to the iBox.
Software Recall Switch Activated, SOFTWARE RECALL ON
Description: The software recall command has been activated via iMonitor.
Car Reaction: The car recalls to the specified floor. Car calls and doors operate as specified by the software
recall command parameters.
Troubleshooting: Check the status of the recall command and related parameters.
SPA Spare Event ‘n’ (n = 1 to 8)
Description: SPA Spare Events 1 through 8 are used for testing.
Table 6.3 iControl Messages
iControl Messages
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