3: I/O Module Fault; Management Of Faults - Honeywell H-S81-HS Operation Manual

Management of Faults

4.2 Management of Faults
This paragraph describes the behavior of system H-S81-HS when the various faults occur.
4.2.1 Power Supply Set Fault
The fault of the power supply set is detected by the central unit during operation. Fault type and
details are shown on the display. Before replacing a module of the power supply set, carefully read
the instructions in Sections 4.2.4, 4.2.5, and 4.2.6.
4.2.2 Central Unit Fault
In case of fault of one of the two CPUs, the system will keep operating without any interruptions.
The faulty CPU is indicated on the display. To this end, please note that "CPU-0" on the display
indicates the CPU in the left slot and "CPU-1" the right one. The faulty CPU can be replaced
during system operation following the instructions in Section 4.2.7.
4.2.3 I/O Module Fault
The fault of one I/O module is detected by the central unit during operation. The position of the
faulty module and the relevant fault type are shown on the display. The faulty I/O module can be
replaced during system operation following the instructions in Section 4.2.8.
4.2.4 Replacing One Module of the S81-PU001 Power Supply Set
Before replacing a module of the S81-PU001 power supply set, the system must be powered down.
This is why this operation requires complete system shutdown.
To replace one module of the S81-PU001 set, operate as follows:
1. Open the disconnect switch S1 that connects the batteries to the power supply set.
2. Deactivate the main switch powering the control panel.
3. Deactivate the external and internal disconnect switches supplying the primary power supply.
4. Use a voltmeter to make sure that no voltage is present on input terminals.
5. Disconnect the wires connected to the faulty module.
6. Remove the 4 fixing screws securing the module to the base plate.
7. Remove the faulty module and mount the new one by tightening the 4 screws.
8. Make the connections following the instructions of the wiring diagram.
9. Activate the disconnect switches that supply the primary power supply, inside and outside the
switchboard.
10. Use a voltmeter to measure the Vload voltage from the power supply set and check that it is
25VDC.
11. Use a voltmeter to measure the Vbat voltage from the power supply set and check that it is
27VDC.
12. Activate the disconnect switch S1 that connects the batteries to the power supply set.
13. Activate the main switch supplying power to the control panel.
4.2.5 Replacing One Module of the S81-PU002 Power Supply Set
The replacement of the modules making up the S81-PU002 power supply set can be made during
operation and does not require system shutdown. To replace the PU-A0009-1 battery charger mod-
ule operate as follows:
1. Open the disconnect switch S1 that connects the batteries to the power supply set.
2. Unscrew the four screws on the front panel.
H-S81-HS Installation & Operation Manual — P/N LS10114-000HI-E:A 2/24/2015
Start-Up and Fault Management
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