Technical data

48
CTC EcoZenith i250
General Information
10.2 Alarm messages
If a fault occurs with a sensor, for instance, an alarm is triggered. A message
appears on the display informing about the fault.
You reset the alarm by pressing the Reset alarm button on the display.
If several alarms are triggered, they are displayed one after the other. An
outstanding fault cannot be reset without being rectified first. Some alarms
are reset automatically if the fault disappears.
The description below also includes an alarm for connected heat pump.
Alarm: Wrong phase order
compressor
Reset alarm
Alarm text Description
Wrong phase order
compressor
The product’s compressor motor must rotate in the right direction. The
product checks that the phases are connected correctly; otherwise, an
alarm is triggered. In this case, two of the phases to the product need to be
changed. The power supply to the system must be shut off when rectifying
this fault. This fault generally only occurs during installation.
Alarm sensor An alarm is displayed if a fault occurs with a sensor that is not connected or
has short-circuited and if the value is outside the sensor's range. If this sensor
is significant to the system's operation, the compressor stops. In this case, the
alarm is reset manually after the fault has been rectified. For these sensors the
alarm is reset automatically after correction:
Sensor upper tank (B5), Sensor lower tank (B6), Sensor prim flow 1 (B1),
Sensor prim flow 2 (B2), Sensor out (B15), Room sensor 1 (B11), Room
sensor 2 (B12), Sensor brine out, Sensor brine in, Sensor HPin, Sensor HPout,
Sensor discharge, Sensor suction gas, Sensor high pressure, Sensor low
pressure.
Motor protect compressor High/low current has been detected to the compressor. Press reset and
check whether the alarm recurs. If the fault recurs, contact your installer.
High pressure switch The refrigerant's high pressure switch has been triggered. Press reset and
check whether the alarm recurs. If the fault recurs, contact your installer.
Low brine temp Incoming brine temperatures from borehole/ground loop are too low. Press
reset and check whether the alarm recurs. If the fault recurs, contact your
installer to check the dimensions of the cold side.
High brine temp Incoming brine temperatures from borehole/ground circuits are too high. Press
reset and check whether the alarm recurs. If the fault recurs, contact your
installer to check the heat source.
Excessively high brine circuit temperatures over a long period can damage the
compressor.
Low brine flow Low brine flow is very often due to air in the collector system, particularly just
after installation. Collectors which are too long can also be a cause. Check
also that the brine pump is set to speed 3. Press reset and check whether the
alarm recurs. Also check the brine filter that has been installed.
If the fault recurs, contact your installer.