D8125 | Installation and Operation Guide | 5.0 Troubleshooting
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Bosch Security Systems B.V. | 2020.04 | F01U036298-15
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1) Restore all POPITs to a normal condition (close all doors and windows), and then disable and
restart the system.
2) Fault a POPIT into a trouble condition (as determined by the master zone code). The D1252A
Keypad displays the faulted condition and the system responds to the POPITs.
3) If unable to resolve the problem, contact Bosch Security Systems Technical Support.
7. Keep all Zone Expansion Loops away from all AC current sources (fluorescent lights, high-voltage
transformers, motors, etc.) or sources of RF interference. AC induction or RF interference may occur
when a ZONEX system is installed in or near the following:
• Radio station transmitter site or other broadcast station
• Ham radio transmitter site
• Computer network system
• Heavy machinery and motors
• PBX telephone system
• Welding shop
• High voltage electrical equipment or transformers
• Public service (police, fire department, etc.) using radio communications
• When wires must be run close to electrical lines, fluorescent fixtures or telephone cabling
8. If shielded cable is used, verify that the drainwire is connected only to Terminal 4 on the
D8112G1/G2. Verify that each splice on the shielded backbone has the drainwires soldered together
and isolated from ground.
