Komfovent RHP Standard, User Manual

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UAB KOMFOVENT we reserve the right to make changes without prior notice
RHP STANDARD_guide_21-03
EN
8. TROUBLESHOOTING
Device automation continuously monitors the operation of various nodes and function algorithms. If something goes
wrong, the device informs you with a message and an audible alarm from a control panel. Messages are divided into critical
messages and notifications. Critical messages occur when the device cannot continue operation without intervention of the
user or an authorised service representative. Notifications are used to warn the user about possible faults or small discrepan-
cies but they do not stop the device.
In case of a message, perform the following actions:
• Read the message and note its number displayed on screen (control panel, computer, smartphone).
• Stop the unit. If heating/cooling devices were running at that time, after pressing the OFF button they will keep running
for a few minutes until their temperature is stabilized.
• When the unit stops, unplug it from the mains.
• Find tips in the “Alarm Table” by the message number.
• If possible, eliminate the cause. If a fault cannot be resolved, contact an authorized service representative.
• After troubleshooting, make sure no foreign objects, debris or tools are left inside the unit, and only then close the unit
door.
• Connect the unit to the mains and delete all messages from the message window.
• If a fault is not resolved, depending on its nature, the device may not start at all or start and then stop after a while by
displaying a message.
Below is a list of messages and recommended actions to resolve faults. These messages are displayed on the C5.1 control
panel, mobile app or a computer. Letter “A” marks critical alarms, letter “B” marks informational messages. If you can’t find
your fault code in the table, contact an authorized service representative.
Code Message Possible cause User‘s actions
1B Low supply air flow
1. Contaminated air filters.
2. Excessive resistance of the air
duct system.
3. VAV air flow control selected
but pressure sensors are not
connected.
4. Supply air fan not working
properly.
1. Check air filters and replace, if needed.
2. Check air dampers, air inlet/exhaust openings.
3. If VAV air flow control is required, install and
connect duct-mounted pressure sensors. If VAV
mode is not necessary – select CAV or DCV in the
settings.
4. Contact authorised service.
2B Low extract air flow
1. Contaminated air filters.
2. Excessive resistance of ducts.
3. VAV air flow control selected
but pressure sensors are not
connected.
4. Exhaust air fan not working
properly.
1. Check air filters and replace, if needed.
2. Check air dampers, air inlet/exhaust openings.
3. If VAV air flow control is required, install and
connect duct-mounted pressure sensors. If VAV
mode is not necessary – select CAV or DCV in the
settings.
4. Contact authorised service.
3B VAV calibration fail
Not connected or faulty pressure
sensors.
Check pressure sensors and their measuring
range. If a sensor needs to be replaced, contact
an authorized service representative.
4B
Change outdoor air
filter Contaminated outdoor air filters. Replace the air handling unit filters and clear the
message.
5B
Change extract air
filter
Contaminated exhaust air filters. Replace the air handling unit filters and clear the
message.
6B-11B Electric heater off
Electrical heater temperature
has risen above 70 °C, because:
1. Supply air flow is too low at
high heating demand.
2. Electric heater
malfunctioning.
When the heater cools down, it will turn on again
automatically.
1 a. Check air filters and air ducts.
1 b. Decrease the desired temperature.
1 c. Increase ventilation intensity.
2. Contact authorised service.