Alarms
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16.9 Alarm functions
The alarm text is indicated in the heading.
16.9.1 High hot gas temperature E2x.T6
Function: Compressor stops. Activated when the
temperature on sensor T6 exceeds the applicable
maximum hot gas temperature.
Alarm timer starts: Yes.
Reset condition: The hot gas temperature drops 5K
below the alarm limit.
Category: A.
Alarm lamp/buzzer: Yes.
Restart: Acknowledgement is required.
16.9.2 Tripped low pressure switch E2x.RLP
Function: The compressor is stopped because of too
low pressure in the refrigerant circuit. Activated on open
contact on the low pressure switch. The alarm is delayed
with 150s after compressor start or alternation between
hot water and heating production.
Alarm timer starts: Yes.
Reset condition: Closed signal over the pressure switch.
Category: A.
Alarm lamp/buzzer: Yes.
Restart: Acknowledgement is required.
16.9.3 Tripped high pressure switch E2x.RHP
Function: The compressor is stopped because of too
high pressure in the refrigerant circuit. Activated on
open contact on the high pressure switch.
Alarm timer starts: Yes.
Reset condition: Closed signal over the pressure switch.
Category: A.
Alarm lamp/buzzer: Yes.
Restart: Acknowledgement is required.
16.9.4 Low pressure collector circuit
Function: If Alarm at low pressure in collector circuit is
selected and the external input closes, this alarm is
triggered. The compressor stops (Æ Chapter 15.6).
Alarm timer starts: Yes.
Reset condition: The pressure exceeds the set level. The
setting is made on the pressure switch.
Category: A.
Alarm lamp/buzzer: Yes.
Restart: Acknowledgement is required.
16.9.5 Low temperature collector circuit in E2x.T10
Function: Warning/alarm is given if the temperature of
the collector circuit in is too low. First, a warning is
given. If the warning appears several times during a
certain time period, the warning transforms into a
category A alarm.
For settings of T10: (ÆChapter 15.9).
Alarm timer starts: Yes.
Reset condition: T10 exceeds the lowest permitted
temperature T10 plus hysteresis.
Category: J which goes over into A.
Alarm lamp/buzzer: Yes.
Restart: Acknowledgement is required in category A.
16.9.6 Low temperature collector circuit out E2x.T11
Function: Warning/alarm is given if the temperature of
the collector circuit out is too low. First, a warning is
given. If the warning appears several times during a
certain time period, the warning transforms into a
category A alarm.
For settings of T11: (ÆChapter 15.9).
Alarm timer starts: Yes.
Reset condition: T11 exceeds the lowest permitted
temperature T11 plus hysteresis.
Category: J which goes over into A.
Alarm lamp/buzzer: Yes.
Restart: Acknowledgement is required in category A.
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