Troubleshooting
6-54 Manual # 42-02-7223
Machine Room Heat Detectors Activated, MR HEAT DETECTORS
Description: The machine room heat detector input is activated. The fire warning light will flash until all heat
detectors have been reset. The fire-warning buzzer will sound until the car is shutdown at a floor.
Car Reaction: A car that is parked at a floor will open its doors and shut down. A car in motion will proceed in
the current direction to the next available floor where the heat detector is not tripped. If all heat detectors in
the current direction are tripped, the car will reverse direction and proceed to the first floor where the heat
detector is not tripped. If again all heat detectors are tripped, the car will proceed to the main fire recall floor
unless the car is also on Fire Service, in which case the car will proceed to the appropriate fire recall floor.
Once the car is stopped at a floor it will automatically open its doors and shut down. Then, if the machine
room or hoistway heat detectors are active, a signal is provided to disconnect the main power line and/or
activate the sprinklers where available. Please refer to “Car Operation - Heat Detectors” on page 9-90.
Car Reaction:
Machine Room Heat Detectors Deactivated
Description: The machine room heat detector input is deactivated.
Car Reaction: The car is allowed to run.
Machine Room Inspection Disabled, MR INSP. DISABLED
Description: Machine room inspection operation has been disabled.
Car Reaction: The car cannot be run on machine room inspection operation.
Troubleshooting:
1. Check for any car status that might prevent machine room inspection operation, e.g. earthquake.
2. Check for the Stuck Inspection Input Fault.
3. Check all inspection buttons (Enable, Up, Down) and verify that none are stuck in the ON position.
Machine Room Inspection Enabled
Description: Machine room inspection operation which was previously disabled is now enabled.
Machine Room Inspection Operation, Machine Rm Inspection, Mach Rm Insp
Description: Car placed in Machine Room Inspection operation using the iBox Inspection switch.
Car Reaction: Car begins operating in Inspection mode. If running, the car will make an emergency stop and
is taken out of normal service. Under this mode of operation, car can only be moved manually using the iBox
Inspection Up and Down switches.
Troubleshooting:
1. Related inputs:
MachineRoomInspection: Normally high
Machine Room Stop Switch Open, MR STOP SWITCH OPEN
Description: The machine room stop switch input has dropped.
Car Reaction: Emergency stop if running. The car is not allowed to run until the problem is corrected.
Troubleshooting:
1. Check the Machine Room stop switch on the front panel of the iBox.
Main Floor Smoke Sensor Recall, MAIN FLOOR SMOKE
Description: Recall to the alternate fire floor due to active or latched smoke detector inputs from the main
floor.
Car Reaction: Car proceeds to the user-defined alternate fire recall floor. Once at the recall floor, door opera-
tion is according to the user-defined door operation under fire recall operation.
Troubleshooting:
1. If in error, inspect the sensor input and connections.
2. Related Inputs: Main floor smoke and fire sensors as indicated on job print drawing(s) -1.
Table 6.3 iControl Messages
iControl Messages
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