User's Manual

FUSE – Station and MV/PS output alert

The TMC-424E features built-in circuit protection to help prevent damage to the controller caused

by an over-current condition on any output terminal.

If the controller detects an overload condition, it will bypass the affected output and display the

word FUSE with the affected station number identifier(s). All remaining stations will operate as

programmed for automatic operation.

If the condition occurs on the Pump Start/Master Valve circuit, all stations using the master valve

will prompt the FUSE message.

To clear the warning, press any button. The controller will continue to operate as scheduled and

will attempt to run all stations as programmed.

IMPORTANT: Clearing the display does not correct the problem. The controller will

retry the affected station(s) at each programmed watering cycle and bypass the affected

station(s) until the problem is corrected.

Before continuing to operate the controller, identify and correct the source of the problem.

In most cases, the FUSE alert condition is caused by a faulty valve solenoid, pump start

relay and/or shorted wire splice.

FLOW or NFLOW – Flow sensor alarms

When flow monitoring is used, the FLOW error message will be displayed when a station

experiences an over-, under-, or critical-flow error. In this event, the station is skipped, and the

next programmed station in sequence is operated.

Error message NFLOW is displayed if the Nominal flow threshold (flow measured while controller

is idle) is exceeded. When a Normally Open master valve is controlled by the flow module, it will

be activated (valve closed).

To clear the warning, press any button. The controller will continue to operate as scheduled and

will attempt to run all stations as programmed.

SEN – Rain sensor active

When the rain sensor is active and all controller outputs are off, the SEN prompt is displayed.

Rain sensor input can be bypassed with the controller’s Sensor Bypass switch, the Timed

Bypass feature and rain sensor receiver controls. For complete information regarding rain sensor

operation, refer to the user’s guide provided with the TWRS/TWRFS units.

PAUSE – Watering suspended by TMR-1 handheld remote

When irrigation is paused using the TMR-1 handheld remote, PAUSE will be displayed.

NOTE: If an optional Display Language is in use, – x – will be shown.

Appendix C: Display Alerts