Morley-IAS ZXSe fault codes

ZX: CONFIG MEMORY fault

The manual says that if the memory lock switch is left in the open position for an extended period of time, the panel will report a CONFIG MEMORY fault. It reminds the engineer to lock the memory after commissioning and refers to Section 8 for further information.

ZX: Earth Fault indicator and message

Yellow Earth Fault indicator on the ZX series panel: an earth connection fault has occurred on a cable. To clear it, correct the fault condition and then perform a panel reset (page 7). The alphanumeric display shows a message such as EARTH FAULT TO -VE ON EXTERNAL WIRING, with a negative or positive sign for the polarity of the fault. The manual says the panel will normally continue to work with a single earth fault, which should still be rectified as soon as possible. To locate it, measure the voltage from the battery negative input to the supply board earth input: on a healthy system this reads approximately 1 V; below 0.3 V the panel registers an earth fault to negative and above 1.5 V an earth fault to positive. Disconnect each external cable in turn (sounder wiring, detector loop wiring, auxiliary 24 V output feed): when the faulty cable is disconnected the voltage returns to 1 V (page 55).

ZX: Fault indicator

Front-panel indicator on the ZX series panel. Function per the manual: the panel has detected a fault (yellow indicator). How to clear, per the manual: correct the condition causing the fault and then perform a panel reset.

ZX: Power indicator

Front-panel indicator on the ZX series panel. Function per the manual: the green Power indicator being steady means AC power is present; flashing means a loss of AC power. How to clear, per the manual: see Supply Fault.

ZX: Sounder Fault indicator

Front-panel indicator on the ZX series panel. Function per the manual: this indicates a wiring fault with one of the sounder output circuits (yellow indicator). How to clear, per the manual: correct the fault condition and then perform a panel reset.

ZX: Supply Fault indicator

Front-panel indicator on the ZX series panel. Function per the manual: there is a problem with the power supply, battery or supply input (yellow indicator). How to clear, per the manual: correct the fault condition and then perform a panel reset.

ZX: System / CPU Fault indicator

Front-panel indicator on the ZX series panel. Function per the manual: the CPU has reset or a system fault has occurred (yellow indicator). How to clear, per the manual: correct the problem, if appropriate, and then perform a panel reset.

ZX: Zone Fault indicator

Front-panel indicator on the ZX series panel. Function per the manual: flashing means the zone contains faulty devices; steady means the zone is either disabled or in test mode (yellow zone indicator). How to clear, per the manual: correct the fault condition and then perform a panel reset for a flashing indicator; re-enable devices or cancel test mode for a steady one.