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Q. Reader Interface show 'Communication Down'.

Check Door Interface communication status (Green & Yellow LED should blink).

Check wiring termination of C+/C- between Door Interface and Reader Interface. Might cause by wrong termination.

Q. Green & Yellow LED not blinking or either one of the LED always light ON.

Check wiring termination of C+/C- between Door Interface and Reader Interface. Might cause by wrong termination.

Change communication IC (75HVD3082). Might cause by faulty IC.

Q. Barrier not open.

Check Controller setting, Card+Pin mode/ Tz should be OFF. Might cause by wrong setting.

Check voltage on EM Lock (Min = 12v). Might cause by no power or low power.

Check termination on Door Interface. Might cause by wrong termination.

Check reader interface active / passive DIP switch. Should be ON.

Q. EM Lock always lock even after valid access or pressing push button.

Check Door Interface Relay 1 LED. Should light ON when valid access and push button trigger. Might cause by faulty relay.

Check Reader Interface voltage (Min = 12v). Might cause by low power so relay not functioning.

Check ampere consumption if have other accessory connected. Might cause by insufficient ampere.

Check push button termination. Might cause by wiring disconnected.

Q. Barrier always open even card passed.

Check CTR16 communication. Respective Relay LED should OFF if Valid detected. Might cause by faulty relay.

Check Reader Interface voltage (Min = 12v). Might cause by low power so relay not functioning.

Check to the Settings, like Lock Release period, Floor zone & Floor Accessibility assignment.

Ensure COM connected to positive value, circuit is protected by polarity.

Re-enroll the finger. Might cause by enrollment was not correctly causes image capture are in poor quality.

Q. Door Interface or Reader Interface often auto reset by its own

Check Controller settingSecurity mode should be ON. Might cause by wrong setting.

Lock Release time shouldnt set too long. Advisable 2 3 sec interval.

Check to Barrier gate loop detector defect?

Q. Reader fail to read / range drop whenever there is an exit reader nearby.

Check reader to reader distance. Might cause by back to back reader frequency interference.

Distance the both reader or add metal pieces behind the reader interface.

Check loop detector defect IF bypass DATA/ CLOCK line to activate reader applied.

Q. Unable to login to controller, always shown 'Invalid Password'.

Check keypad connection. Might cause by keypad wrongly connected.

If problem persist do a Cold Start (All data will be cleared). Might cause by controller data corrupted.

Q. Controller / Reader Interface always auto reset once in a while.

Check hardware voltage. Might cause by low power or unstable current.

Check DIP switch setting, Might cause by address crash.

Q. System often down whenever there is lightning storm or blackout.

Check electrical grounding of the system. Might cause by improper grounding.

Check system hardware / wiring does not go through or nearby high current cable. Might cause by power surge.

Add lightning surge protector if system was expose to open air.