Flashing red LED on my Webasto controller

B

baz

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Joined
Jun 19, 2009
Messages
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Fluid Motion Model
C-24 C
Subject: Flashing red LED on my Webasto controller

I visited my R-27/OB to check things and found the Control unit for the Webasto heater was flashing red LED lights on both sides every few seconds. My quick reading indicated this means an error code has been posted. I didn't have enough info at hand to figure out how to display the error code.

Is this something I should resolved quickly or can I leave it this way for a while ?
 
You need to do some flashes counting.
Extract from the manual is below.
The five is just a warning.
The number of rapids indicates the fault.

Most are remedied by turning the thing off for 5 minutes and trying again. Especially if it has not been used for some time.


"Self-Diagnostic System (Reading Flash Codes)
A flash code will be generated on the indicator light of the control element. These flash codes indicate a
malfunction and subsequent operational interruption. There are up to ten codes available depending on
the nature of the malfunction and the heater model (see Table 2).
In order to make a correct analysis, it is necessary to understand the flash code event. The flash code
pertains to the control element (switch) only. The flash code is only visible during the after-run (cooldown)
period of operation (an optional timer will hold the last code in memory until corrected, see “F”
codes in parentheses on Table 2).

During the flash code event, you will see five quick flashes followed by a slower sequence of flashes from
one flash up to ten flashes. The slower sequence of flashes is the actual malfunction code. The five quick
flashes are only an indication that a malfunction has been detected and that the code will be displayed.
Count only the slower sequence of flashes to obtain the current malfunction code.
For example ( = one flash):
Event code 4X (F 04): ... ... ... ...
The fast/slow sequence will be repeated until the heater completes the after-run (cool-down) cycle after
which, the code will be stored in the control unit memory.

No Function Electrical wiring, fuses
Control unit
Fuses, battery connections
Power at red wire, ground at brown wire
Control unit malfunction

1X Flash (F 01)
No start after 2 start
attempts No flame-up
Fuel system
Combustion air
Burner
Fuel level - No fuel - Fuel system not primed
Type of fuel being used
Plugged fuel filter - replace
Fuel line connections and clamps loose
Air intake or exhaust - restricted or plugged
Clean or replace burner unit

2X Flashes (F 02)
Flame-out during
operation
Fuel supply (shortage)
Burner
Restriction in fuel system
Plugged fuel filter - replace
Fuel line connections and clamps loose
Type of fuel being used
Clean or replace burner unit

3X Flashes (F 03)
Low or over voltage for
more than 20 seconds
Electrical system Load test batteries
Corrosion at connections
Loose connections

4X Flashes (F 04)
Premature flame
detection
Defective flame sensor
Defective flame sensor/
glow pin
Replace flame sensor - Air Top 2000 S only
Replace flame sensor/glow pin - Air Top 3500/5000
only

5X Flashes (F 05)
(Air Top 2000 S Only)
Flame sensor
Wiring
Defective flame sensor
Damaged or corroded wiring, open or short circuit
Replace flame sensor

6X Flashes (F 06)
Temperature sensor
Wiring
Defective temp. sensor
Damaged or corroded wiring, open or short circuit
Replace temperature sensor

7X Flashes (F 07)
Fuel metering pump
Wiring
Defective fuel pump
Damaged or corroded wiring, open or short circuit
Replace fuel pump

8X Flashes (F 08)
Combustion air fan
Wiring
Wrong RPM
Defective fan motor
Damaged or corroded wiring, open or short circuit
Replace combustion air fan
Replace combustion air fan

9X Flashes (F 09)
Glow pin
(Ceramic igniter)
Wiring
Defective glow pin
Defective flame sensor/
glow pin
Damaged or corroded wiring, open or short circuit
Replace glow pin - Air Top 2000 S only
Replace flame sensor/glow pin - Air Top 3500/5000
only

10X Flashes (F 10)
Overheating
Overheating
Air flow
Wiring
Defective temp. limiter
Switch heater off and back on (see air flow)
Motor/fan obstruction, heating air flow blocked
Damaged or corroded wiring, open or short circuit
Replace temperature limiter

11X Flashes (F 11)
(Air Top 3500/5000 Only)
Temperature limiter
Wiring
Defective temp. limiter
Damaged or corroded wiring, open or short circuit
Replace temperature limiter

12X Flashes (F 12)
(Air Top 3500/5000 Only)
Control element
Wiring
Defective control element
Damaged or corroded wiring, open or short circuit
Replace control element
Read more at http://www.ybw.com/forums/showthread.ph ... AsCUjtR.99
 
Chimo: Thanks very much for all that info. However, the controller was NOT flashing other than once. The red LEDs would flash on and then off and then maybe 5 seconds flash on and off again. This repeated ALL the time regardless of the heater being ON or being OFF.

I eventually contacted Kenny/Andrew/Tim today when down on the boat before taking a short cruise. Both Andrew and Tim were in the mountains somewhere and cell communication was a bit off & on. I first called Kenny and left voicemail and he returned my call while I was talking with Andrew. Tim's phone was better so I eventually started chatting with Tim to resolve the issue.

The issue was resolved and I'll post back later on what the issue was and what was done to resolve it.
 
To reiterate the issue....

Problem/issue

1) The Webasto controller was displaying its two red LEDs every few seconds. They would light up red and then go OFF and then some 5 seconds later would light up again. This was continuous and persisted regardless of the heater being ON or OFF.

2) Pressing the menu selection button (the lower button) displayed only Start and Snooze and only one or the other could be selected with the outer rotary knob. The ability to select "Error code" was not possible as it was not displayed as a selectable item.

3) The heater could be turned ON to produce heat and could be turned OFF without issues.

Resolution (after chatting with Andrew Custis & Time Bates of RT)

1) Allow the heater to be OFF completely. This meant waiting for the blower to stop.

2) Access the two Webasto fuse holders in the cubby hole in the base of the cave area where all the electrical switches and displays are.... including the Webasto controller. See photo album given below for where this cubby hole is.

3) Pull up the fuse holder clips and pull out the fuse holder and remove the small two-prong spade-type fuses at their base.

4) Wait for around 10 seconds, and then replace the two fuses and place back into their holders.

5) Check that the red LEDs no longer come ON/OFF. They did not.

6) Start the heater and it started AOK and produced heat subsequently.

7) Press the menu selector button and then select Error code. This revealed a code of F07(Metering pump interrupt or pump short circuit). Presumably this code represented the fact that the Webasto had been reset via the fuse removals.

8) The error code for the weird red LEDs lighting up and then off initially presumably was erased with the Webasto being reset when the fuses were pulled.

Here's the photo album that will help understand details for understand the above descriptions.

https://www.icloud.com/sharedalbum/#B0i52plgjKUpxz
 
I'm now in the possession of the Webasto heater Manual sent to me by RT.

I note in the Menu Description section there's a "PM Reminder". It states

If heater has not run for 30 days, the preventive maintenance (PM) reminder will alert the operator with a message to run the heater for 20 minutes. The indicator lights will flash red as a visual reminder. The operator will have the ability to Start the 20 minute maintenance cycle or delay it via a "Snooze" option. When Snooze is selected the PM reminder will postpone until 12:00PM the following day.

The Default column for the "PM Reminder" states "ON".

Could this be the reason why my SmarTemp Control's status indicator lights were flashing red every few seconds ?

I did note that when this was happening the menu display did display "Snooze" & "Start". I don't recall selecting "Start" and pressing the Selection Button, so wonder if I had, would the heater have performed its maintenance operation for 20 minutes and then turn off and the red lights stopped from flashing ?

Has anyone had to perform this maintenance activity due to the heater having not been used for 30 days ?

Thanks... 🙂
 
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