E
RRORS
A
IR
HEATER
en-68
en
E6
For water-heated models:
Risk of freezing because discharge tem-
perature is too low. Frost protection
has been activated.
Freezing may cause damage to
the heat exchanger.
1. Clear the error message.
2. Ensure that the temperature in the room rises above 8
ºC(47 ºF).
3. Follow the instructions for error code F3
You can prevent this error by setting the unit to switch on
the central heating system when there is a risk of freezing
(Function
61. Function of outputs
on
Heating on
).
E7
Fan error.
1. Clear the error message
2. Check the fans. If one or more fans do not work, then
check:
• the fan wiring;
• the connections on the control circuit board (X344);
• the transformer fuse;
• the transformer itself.
If these are in order, then replace the fan.
F2
For water-heated models:
There is too much heating.
This error may occur if the control
valve does not work correctly.
1. Switch the unit OFF using the control panel, wait for one
minute, and switch it ON again.
2. Check that the connections of the supply and return
pipes have not been interchanged.
3. Check the wiring and connectors of the valve drive (X67/
X370) and the discharge temperature sensor (X350).
4. Remove the drive from the valve and check the interior
for mechanical operation and defects.
C
ODE
P
ROBABLE
CAUSE
W
HAT
TO
DO
