UNTES URTP055 Instructions For Installation, Commisioning, Maintenance And Use page 62

Exhaling Fan Failure: Check the feed fuse and frequency invertor of the exhaling fan motor.
Resetting the alarm from the room control unit may not suffice; reset from the frequency inverter may be
required as well.
Filter Contaminated Warning: Check the different pressure key and the status of dirt in the filters.
Exhaling Air Temperature Sensor Failure: Check the temperature value taken from the sensor. Check
the electrical cable connections.
Room Air Temperature Sensor Failure: This sensor is located below the room control unit. Check the
temperature value taken from the sensor.
Room Humidity Sensor Failure: Check the temperature value taken from the sensor. Check the
electrical cable connections.
Exhaling Air Different Pressure Switch Failure: This sensor is used with the option of flow control.
Check the air probe connections of the sensor and the electrical cable connections.
Hot Water Heating Battery Freezing Warning: Check the electrical cable connections and setting value
of the freezing thermostat. Resetting the alarm only from the room control unit will not suffice as the
freezing thermostat requires manual reset.
Electrical Heater High Temperature Alarm: Check the electrical cable connections and setting value of
the electrical heater thermostat.
Gas Combustion Unit Alarm: Check the electrical cable connections of the gas combustion unit. Resetting
the alarm only from the room control unit will not suffice as the control card of the gas combustion unit
requires manual reset.
Exhaust/Return Fan Failure: Check the feed fuse of the exhaust or Return Fan motors, and check the
electrical cable connections and connection elements.
Circuit 1 High Pressure Alarm: Check the operation status of the condenser fan, electrical cable
connection of the high pressure Switch and status of dirt on the surface of the heat exchanger. Resetting the
alarm only from the room control unit will not suffice as the high pressure alarm requires manual reset from
the high pressure Switch.
Circuit 1 Low Pressure Alarm: Check the gas pressures of the system and the electrical cable connections
of the low pressure Switch.
Circuit 1 Compressor Thermal Alarm: Check the operative currents of the compressor and the motor
protection switch. Resetting the alarm only from the room control unit will not suffice as the motor
protection switch of the compressor requires manual reset.
Circuit 1 Compressor Suction Temperature Sensor Failure: Check the temperature value taken from the
sensor. Check the electrical cable connections.
Circuit 2 High Pressure Alarm : Check the operation status of the condenser fan, electrical cable
connection of the high pressure Switch and status of dirt on the surface of the battery. Resetting the alarm
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