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Page 30
Shutdown Mode
The Terranova® 752A will enter a shutdown state to protect the equipment from possible damage
or indicate equipment failure. When a channel enters a shutdown state, the respective high
voltage operation is disabled, a 5-second BEEP is emitted – if speaker is not disabled – and the
respective failure code is output onto the corresponding CURRENT display. User should correct
the issue that caused the shutdown before restarting high voltage operation. To recover from a
shutdown state, high voltage operation may only be restarted via the respective
HIGH VOLTAGE
ON/OFF
button.
Over Current Protection
Code SD (or 01 in serial communication) is displayed when high voltage output is shorted to
ground or power output remains relatively high for the respective channel. Over current can be
due to a malfunction of either the ion pump or ion pump cable. Code SD is also displayed on the
respective channel when current output is not successfully reduced during the Cool-down Mode.
Transformer failure
Code HF (or 06 in serial communication) is output when the high voltage transformer has
failed on the respective channel. The channel may output relatively low or zero voltage on the
corresponding HIGH VOLTAGE display.
Over Temperature Protection
Code CF (or 07 in serial communication) is output whenever the Terranova® 752A overheats
during operation. The control unit will overheat if the internal fan has failed. The control unit may
also overheat if it is not properly ventilated. User should ensure ventilation ports are not blocked
and check for possible external heat sources near the control unit.
User cannot recuperate from a shutdown state via
remote operation
NOTE
Since 1976
