User manual

Chapter 5: Monitoring and maintaining your TVS Phason
40
To acknowledge alarms
Press Select.
If there is only one alarm message, the TVS clears the message and returns to the main display. If
there are additional alarm messages, the TVS displays the next message.
For a list of alarm messages, their descriptions, and possible resolutions, read
Alarm and error messages on page 51.
 Acknowledging alarms clears the alarm message; it does not deactivate the
alarm relay or LED. To deactivate the alarm relay, resolve the problem causing
the alarm condition.
 If you acknowledge the alarm, but do not resolve the problem causing the alarm
condition, the alarm message displays again after five minutes without any key
presses.
 If the condition causing the alarm returns to normal (for example, the
temperature drops below the high alarm setting), the alarm relay and LED
deactivate, but the alarm message remains.
Testing settings and equipment
The TVS has two test utilities: stage override mode and temperature override mode.
Using stage override mode, parameter 28
Stage override mode is for individually testing the installation and equipment connected to the TVS.
When you enter stage override mode, all stages switch off. You can then change the output of the
stages: 0 to 100% for variable stages, OFF or ON for the relay stage and the alarm relay.
All equipment remains at the state you set it until you leave stage override mode, then it returns to
normal, programmed operation. For example, if stage 3 is a cooling stage and you switch it ON, it
remains on until you leave stage override mode.