Phason Natural Ventilation Control, Руководство пользователя

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Phason Natural Ventilation Control
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Alarm settings and conditions
When there is an alarm condition, the alarm relay activates and the Alarm LED flashes. The display
alternates between the ambient temperature and the alarm message.
When the condition goes away, the alarm relay deactivates and the Alarm LED switches off. The
display continues to alternate between the temperature and alarm message until you acknowledge
the alarm. To acknowledge an alarm, press
Select
.
There are four alarm conditions.

High temperature:
is when the temperature is above the high temperature alarm setting. You can
adjust the high temperature alarm from the Low alarm value to 125°F (51.7°C).

Low temperature:
is when the temperature is below the low temperature alarm setting. You can
adjust the low temperature alarm from -13°F (-25°C) to the
High alarm
value.

Probe short:
is when the temperature probe is shorted (the temperature circuit is closed).

Probe damage:
is when the temperature probe is missing or broken (the temperature circuit is
open).
When there is a probe damage or probe short condition, the control switches all
relays off.
Alarm messages
Message and description Possible cause Possible solution
Hi
High temperature alarm
The ambient temperature is too high.
The high temperature alarm setting is
too low.

Increase ventilation/cooling.

Increase the high temperature alarm setting.
For more information, read
To program the
High alarm on page 14.
Lo
Low temperature alarm
The ambient temperature is too low.
The low temperature alarm setting is
too high.

Decrease ventilation/cooling, increase heating.

Decrease the low temperature alarm setting.
For more information, read
To program the
Low alarm on page 14.
pd
Probe damage alarm
The temperature probe is damaged,
missing, or the connecting wire is
broken. The temperature probe
circuit is open.

Check the wire between the control and the
probe. Wire damage can cause the alarm.

Replace or reconnect the temperature probe.
The control should recover automatically.
ps
Probe short alarm
The temperature probe is damaged.
The temperature probe circuit is
closed.

Check the wire between the control and the
probe. Wire damage can cause the alarm.

Replace the temperature probe. The control
should recover automatically.