Alarms
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17.9 Alarm functions
The alarm text is indicated in the heading.
17.9.1 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.
17.9.2 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.
17.9.3 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.
17.9.4 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 16.6 ).
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.
17.9.5 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 16.9 ).
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.
17.9.6 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 16.9 ).
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.
17.9.7 Too high boot count I/O board BAS x
Function: Compressor stops. Is activated if the controller has executed
more than three new starts after the alarm Check CANbus cable
connection,
(Æ Chapter 17.9.40 ).
Alarm timer starts: Yes.
Reset condition: The CANbus communication with the controller has
been restored.
Category: A.
Alarm lamp/buzzer: Yes.
Restart: Acknowledgement is required.
B Contact the dealer if the alarm remains after acknowledgement.
17.9.8 Motor cut-out 1 E2x.F11, Compressor
Function: Activated when the compressor's motor cut-out has tripped
because of high current or lost current phase resulting in undue strain on
the compressor.
Alarms may also be due to alarms from the soft starter (Æ Chapter
10.2 ).
Alarm timer starts: Yes.
Reset condition: Motor cut-out reset.
Category: B.
Alarm lamp/buzzer: Yes.
Restart: Reset the motor cut-out / correct the softstarter alarm.
17.9.9 Failure on sensor E2x.T6 hot gas
Function: The compressor stops because the hot gas cut-out cannot be
guaranteed. Activated when the sensor's value indicates a temperature
lower than -50 °C.
Alarm timer starts: Yes.
Reset condition: The value of the sensor indicates >
-50 °C.
Category: E.
Alarm lamp/buzzer: Yes.
Restart: Automatic once the alarm cause has disappeared.
17.9.10 Short circuit on sensor E2x.T6 hot gas
Function: The compressor stops because the hot gas cut-out cannot be
guaranteed. Activated when the sensor's resistance value indicates a
temperature higher than 150 °C.
Alarm timer starts: Yes.
Reset condition: The value of the sensor indicates < 150 °C.
Category: E.
Alarm lamp/buzzer: Yes.
Restart: Automatic once the alarm cause has disappeared.
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