69
ERROR DETECTION
If none of the adjoining information helps to start/clear up the error then contact your electrician/retailer.
Type of fault
Check...
Remedy
Nothing shows on the display. ...The batteries.
Change the 3 AA batteries.
Can’t enter the menus,
...If keylock is activated.
Disable, push the left buttom down for 3 seconds.
the keys are locked
”Please wait” is displayed.
Wait for 15 minutes. If the message still twinkles,
go to next step.
...That the unit has power.
Check the fuse, residual current device and connection.
...The antenna, it should not be mounted against Move the antenna.
any metal ductwork as this can shield the signal.
...That the wireless control unit is synchronized
See page 65.
with the unit.
The unit does not start.
...That the unit has power.
Check the fuse, residual current device and connecting.
...That the set point is ”On”.
See page 54.
...That the unit is connected correctly.
See page 79.
When the electrical supply is turned on the unit
See page 46.
starts automatically with a few minutes delay.
...Other alarms.
See below.
The unit has stopped.
...That the unit has power.
Check the fuse and safety switch.
...If alarm is triggered.
Check why the alarm is on.
When caused error is resolved, restore alarm.
After alarm reset, check so the rotor motor is rotating
and the fans spinning.
...That the right flow direction is choosed.
See page 63.
When starting the unit the
...If the unit is installed left or right handed.
Set the flow direction. See page 63.
wireless control unit displays
wrong temperature alt. alarm
of to low temperature.
Can’t activate
...That pressure sensor is installed.
Activate sensor. See page 56.
the filter measurement.
Other alarms:
Filter.
...If filters are dirty.
Change filter.
...If the set time for filter measurement is reached Change filter.
Sensor open.
...Which sensor is triggered, see page 54.
Connection to relay card. If error remains,
change broken sensor.
...The menus for heater and regulation mode.
Make the right setting for heater and regulation mode.
See pages 61-62.
Sensor shorted.
...Which sensor is triggered, see page 54.
Connection to relay card. If error remains,
change broken sensor.
Rotor stop.
...The Function of rotor, rotor motor, roror sensor Replace the faulty part.
and that the rotor belt is intact?
Overheating.
...If the heat protection of the duct heater is
Restore the manual overheating protection and
triggered. NB! The unit must be currentless.
reset the alarm.
Low supply air temperature.
...If filters are dirty.
Change filter.
...If the rotor belt slips.
Change rotor belt.
...If the duct heater works.
Ensure function before startup.
...That the right flow direction is choosed.
See page 63.
Low rotor temperature.
...If filters are dirty.
Change filter.
...If the rotor belt slips.
Change rotor belt.
Fire alarm.
...Why the fire alarm is triggered.
Ensure function before startup.
Freeze protection.
...There’s enough heat to the heating coil.
Ensure function of the heating coil before startup.
...The valve actuator opens as it should.
Ensure function of the valve actuator before startup.
Motor failure.
...Power to the fans and quick connectors.
Ensure function and change broken fan before startup.
...That the impeller is not blocked
Ensure function before startup.
Supply or exhaust air is missing. ...The air intake.
Clean intake grille if dirty.
or effeciency too high.
...Supply and exhaust air filters.
Change filter
Effeciency too low.
...If filters are dirty..
Change filter.
...If extract air temperature is low.
Check the installation.
Problem when adjusting
...That the function for summer cooling is ”Off”. See page 63.
the air flow.
Electric heater is not warm.
...If the heater is correct connected.
See page 79.
...That electric heater is ”On” in the Service menu. See page 61.
1270421_utg2_HERU_K_SV_EN.pdf 69
2018-03-12 10:00:28
Summary of Contents for HERU 70 K EC
Page 12: ...12 REGLERSCHEMA HERU K SOM VISAR SAMTLIGA GIVARE FL DESRIKTNING H GER GT7...
Page 34: ...34...
Page 35: ...35...
Page 37: ...37...
Page 48: ...48 CONTROL DIAGRAM HERU K SHOWS ALL SENSORS FLOW DIRECTION RIGHT GT7 EXHAUST AIR EXTRACT AIR...
Page 70: ...70...
Page 71: ...71...
Page 79: ...79 WIRING DIAGRAM KOPPLINGSSCHEMA 4040203 HERU 70 K A With electrical heater Med elv rmare...
