MTS Multi-Pump Control Manager Remote Human-Machine Interface - Manual (Page 31)

Recovering From an Interlock
Remote Human Machine Interface Operation 29
Watchdog Fault
The HPU Fault Status on the user interface panel displays Watchdog fault if the
watchdog timer stops operating properly. A watchdog fault causes the HPU to
shutdown. Perform the following procedure to attempt to recover from this fault.
1. Turn the power disconnect switch on the main enclosure to off.
2. Wait at least 60 seconds, then turn the power disconnect switch to on.
3. From the Startup Screen, press the Main Display button.
4. On the Main Display screen, press the Reset button.
5. If the Watchdog fault condition does not clear, contact MTS Systems
Dirty filter
A dirty filter interlock is indicated on the Main screen by a yellow Alarm
indicator and a blue Status indicator. Press the Status button to display the Status
screen and note the yellow Return Filter Dirty or Press(ure) Filter Dirty
indicator(s). The interlock is generated when the filter capacity has reached a
critical level. A dirty filter condition will prevent the HPU from being started, but
it will not stop the HPU while it is running.
1. Replace the dirty hydraulic fluid filter. Refer to procedures for return line
filter replacement and high pressure filter replacement as required.
2. Press Reset to clear the interlock and turn the indicator off.