DF M
ANUAL
E
RRORS
Manual version 3.0 (21-11-2017)
en-37
en
See also:
2.6.2 "Control panel settings" on page 20
2.6.3 "External control input" on page 21
2.6.5 "Unit settings" on page 22
2.6.1 "Special points regarding the control panel" on page 19
6.2
"High-limit thermostat" on page 42
The unit (or part of the unit) is
blowing cold air.
The LEDs on the control panel are
flashing.
For electrically heated units:
The temperature cut-out has
turned the unit (or part of the unit)
off to prevent overheating.
w
This may indicate a seri-
ous fault that may be
hazardous.
This fault can also occur if the unit
has been powered down for a short
while.
1. Check and reset the tempera-
ture cut-out.
2. Check the fans. If one or more
fans do not work, check:
• the fan wiring;
• control circuit board connec-
tions
• control circuit board fuses
3. If these are in order, then
replace the fan.
Discharge air is not hot enough.
For water-heated units:
The supply water temperature is
too low.
Raise the central heating system’s
water temperature.
For electrically heated units:
One or more phases on the power
supply have tripped out.
1. Check the power supply’s fuses
and electrical connections.
2. Check the control thermostat.
These should be set to 60°C.
The unit continues to blow hot air.
For water-heated units:
The valve has been opened manu-
ally.
Turn the handle on the valve to the
‘AUTO’ position.
The unit always blows cold air in
automatic mode.
The temperature sensor is not
working.
1. Check Connector J3 on the con-
trol circuit board.
2. Replace the sensor.
If multiple units have been con-
nected to a single control panel:
The units warm up unevenly in
automatic mode.
The temperature is set indepen-
dently in each unit.
Configure one unit as a master.
PROBLEM
POSSIBLE
CAUSE
RESOLUTION
