Alarm - Danfoss ECL Comfort 210 Operating Manual

Operating Guide ECL Comfort 210/296/310, application A232 / A332

5.10 Alarm

The section "Alarm" describes specific application related issues.
Application A232 offers different types of alarms:
1. Actual flow temperature differs from the desired flow
temperature
2. Disconnection or short-circuiting of a temperature sensor or
its connection
3. Max. temperature in heating circuit
The alarm functions activate the alarm bell-symbol.
The alarm functions activate only A1 (relay 6) in the subtypes
A332.1 . . . A332.4.
The alarm relay can activate a lamp, a horn, an input to an alarm
transmitting device etc.
The alarm symbol / relay is activated:
• as long as the alarm reason is present (automatic reset).
Alarm type 1:
If the flow temperature deviates more than the set differences from
the desired flow temperature, the alarm symbol / relay will be
activated.
If the flow temperature becomes acceptable, the alarm symbol /
relay will be de-activated.
Alarm type 2:
Selected temperature sensors can be monitored.
Should the connection to the temperature sensor be disconnected,
short-circuited or the sensor gets defective, the alarm symbol /
relay will be activated. In the "Raw input overview" the sensor in
question is marked and the alarm can be reset.
Alarm type 3:
If the flow temperature exceeds the alarm temperature value, the
circulation pump is switched OFF, the control valve closes and the
alarm symbol / relay is activated. This safety function can prevent a
too high flow temperature in the floor circuit.
If the flow temperature gets below the alarm value, the circulation
pump will be switched ON, the control valve will operate normally
and the alarm symbol / relay will be de-activated.
The circulation pump is switched OFF for 35 minutes as long as the
flow temperature is too high. Despite this, the circulation pump is
then switched ON for 30 seconds to verify if the circulated water
has a lower temperature.
Alarm overview
2: Max. temp.
3: Temp. monitor
32: T sensor defect
VI.JM.G2.02
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