C6-17-08
UAB AMALVA we reserve the right to make changes without prior notice
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Table 2.6.1. Alarms displayed in the C6.1 control panel, their possible causes and elimination methods
Code
Notification
Possible cause
Elimination
F1
Low supply air flow
Too high resistance of the ventila
-
tion system
Check the air valves, air filters or
ventilation system for clogging.
F2
Low extract air flow
F3
Return water temperature low
The temperature of the return water
in the water heater has dropped
below the acceptable limits
Check the condition of the circula
-
tion pump on the heating system,
and the mixing valve actuator.
F4
Low supply air temperature
Unlisted or uncontrollable heating
unit or insufficient power
Check the heating unit
F5
High supply air temperature
F6
Electric heater overheat
The heater has overheated due to a
too low air flow
After the heater has cooled down,
restore the protection by pressing
the RESET button
F7
Heat exchanger failure
Blocked or not rotating rotor, by-
pass damper failure
Check the drive condition of the
rotary or the plate heat exchanger.
F8
Heat exchanger icing
Icing may occur in low outdoor
temperatures and in high room
humidity
Check the operation and protection
system of the initial electric heater.
F9
Internal fire alarm
Risk of fire in the ventilation system Check the ventilation system. Find
the source of the heat.
F10
External fire alarm
Fire alarm from the building’s fire
protection system
Once the fire alarm signal disap
-
pears, the unit needs to be restarted
immediately from the control panel.
F11 – F22
Temperature sensor(s) failure(s)
Disconnected or faulty temperature
sensor(s)
It is necessary to check the sen
-
sor connections or to change the
sensor.
F23 – F27
Controller failure
Inner main controller failure
Replace the main controller.
W1
Clogged air filters
It is time to replace the air handling
unit air filters
Change the filters after turning off
the unit.
W2
Service mode
A temporary mode, which can be
activated by the service personnel
The service mode is switched off by
simply deleting the alert message.
Table 2.6.2. Alarms displayed in the C6.2 control panel, their possible causes and elimination methods
Indication
Operation
Possible cause
Elimination
Red light warning indicator
The unit is operating
Dirty air filters
Change the filters after turning
off the unit.
Flashing red warning indicator The unit is operating
A temporary mode, which can be
activated by the service personnel
The service mode is switched
off by simply deleting the alert
message.
Flashing red warning indicator The unit is not operating
Critical failure(s) for which the unit
is stopped
More details about the fault
can be viewed online using the
computer or a smart phone.
All panel indicators are flashing N/A
Damaged or incorrectly connected
connection cable between the
remote control panel and the unit
Check the control panel con
-
nection
Reset the emergency electric heater overheating protection system us
-
ing the RESET button, only after clarifying the cause of the overheating
and eliminating it.
Before performing any work inside the equipment, make sure that the
machine is switched off and disconnected from the mains power supply.
Once the failure has been eliminated, activate the power supply and
erase the error message. However, if a fault is not eliminated, the device
will either start again and then stop, or will not start and the error mes
-
sage will continue to be displayed.
