
Manual_S5_Airplus_2015_04_20
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©
Wodtke GmbH - Tübingen. All Rights and Changes Reserved.Printed 04/2015
Part No. 950 976
HP Er1 =
Main board defective
(24 V digital inputs
"ON/OFF," "MIN/MAX,"
"Reserve input") or one
or more of these 24 V
digital inputs wired in-
correctly.
The board-internal 24 V supply voltage is no longer con-
nected to digital inputs "ON/OFF," "MIN/MAX" or "Reserve
input."
Case A:
One or more of the digital inputs were connected
incorrectly externally connected (connected to ground) or
external controllers are defective.
Case B:
One or more of the digital inputs are defective or
broken (cold soldering points, etc.)
Case A:
Inspect cabling and external
controllers of all 3 inputs (testing pos-
sible with simple bridge wire), replace
as appl reset via I/O button
Case B:
Replace main board.
Atten-
tion:
Ensure that a board which is
compatible with the respective unit is
installed (note correct kW number and
program version).
HP Er2 =
Main board reference
temperature sensor de-
fective
Component error, reference temperature sensor of main
board
Replace main board
HP Er3 =
Main board EEPROM
write/read error
Data cannot be correctly read (one-time transfer error when
writing/reading data to EEPROM of main board) or cannot
be read at all (EEPROM error).
Replace main board.
R4 Er1 =
"Reserve 4" output de-
fective
Component error, safety relay
Replace main board
PL Err =
pellet
drawer
(pellet
container) open too long
Pellet drawer opened for longer than 3 minutes at a time
during operation or not closed correctly. Or pellet drawer
contact switch defective.
Close pellet drawer. Inspect switch /
wiring as necessary.
Reset via I/O button.
FT Err =
combustion
chamber
door open too long dur-
ing operation
Combustion chamber door opened for longer than 1 minute
at a time during operation or not closed correctly.
Close combustion chamber door. In-
spect switch / wiring as necessary.
Reset via I/O button.
L - Err =
continuous air shortage
Minimum air volume threshold in intake pipe underrun mul-
tiple times.
Allow furnace to cool, find and resolve
external cause.
Not a furnace defect.
Check whether all openings / doors
on furnace are closed. Check com-
bustion air supply / lines and heating
gas draughts / pathways as well as
furnace seals.