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Bedienungsanleitung Steuerung S4_2006_09_25-neu.doc Page 33 / 83
© wodtke GmbH Tübingen. All rights reserved. Subject to change without notice. Month of issue xx/2007 Art. No. 950 281
Error code Cause of error How to correct error
HP Er1 =
Main circuit board
defective (24V digital
inputs “ON/OFF“,
“MIN/MAX”, „auxiliary
input“) or one or
several of these 24 V
digital inputs
misconnected.
The board’s internal 24V supply is no longer
available at one or several of the digital inputs
“ON/OFF”, “MIN/MAX” or “auxiliary input”.
Case A: One or several digital inputs have been
misconnected (earthed) or external controllers
defective.
Case B: one or several digital inputs are defective or
broken (cold joint etc.)
Case A:
Check wiring and
external controllers for all three
inputs (using a simple bridge
wire), replace if necessary +
reset via I/O key.
Case B: Replace main circuit
board. Note: Make sure that the
new board is compatible with its
appliance (correct kW rating and
programme version)
HP Er2 =
Reference
temperature sensor on
main circuit board
defective
Component error: reference temperature sensor on
main circuit board defective
Replace main circuit board
HP Er3 =
Write / Read error by
EEPROM on main
circuit board
Data have not been read correctly (one-time
transmission error while writing data to / reading data
from EEPROM on main circuit board) or cannot be
read at all (EEPROM error).
Reset via I/O key and restart. If
error HP Er3 occurs repeatedly
or if it cannot be reset, you will
need to replace the main circuit
board.
1
R4 Er1 =
Auxiliary output 4
defective
Component error: safety relay defective
Replace main circuit board
7.2 Overview of class 2 errors & error codes (not safety-relevant)
Class 2 errors are of secondary importance (not safety-relevant) and there is no need for a
manual reset once the cause of the error has been eliminated, since the appliance will
automatically resume regular operation.
Class 2 error code
Cause of error
Desired
value How to correct error
L
-
LO
=
Air flow in suction pipe too
low; “L- LO” and the relevant
programme message blink
alternately.
Measuring point: Air flow
sensor in suction pipe [= two
resistors, one permanently
heated, in bridge circuit.
Cooling dependent on air flow
speed]
External error / Operating error! Air flow
in suction pipe below permissible
minimum for longer than 5 seconds.
This can happen when the firedoor is
opened no air flow through suction
pipe
Other possible cause: The air flow may
also be blocked by extreme soiling of the
flueways or connection piece.
L > 2.0
Values are
sampled
continuously
starting 1
minute after
start-up. After
restart the
first sampling
again takes
place after 1
minute.
This is no hardware
error! Close firedoor (if
open) or search for other
cause (for ex. inspection
hole open, door not tight).
Service and clean as
necessary. Appliance will
resume operation in
previous programme as
soon as the error has been
eliminated.
Exception: Temperature of
flue gas has dropped. In
this case the message
“TR” appears see class
1 error codes.
TW Er1 =
Internal boiler sensor broken
Only possible in Waterplus
models!
Breakage = component error
Appliance continues
operation / pump switches
to continuous operation.
Error message is
deactivated as soon as
sensor has been replaced.
TW Er2 =
Short circuit in internal boiler
sensor
Only possible in Waterplus
models!
Short circuit = component error
Appliance continues
operation / pump switches
to continuous operation.
Error message is
deactivated as soon as
sensor has been replaced.
1
Service technicians can try to reload the wtk file into the stove using PC-Tool 2 as a last resort.
33


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