MDC XT16HR EAST WEST 2021, Руководство пользователя

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Appendix A – Error Codes
If the appliance malfunctions, LED 2 (refer to “Overview / Designation of parts” on page 2) will flash to indicate the malfunc
-
tion. There are short and long intervals of flashing. The flashing will repeat every 3 seconds.
1. Note the flashing intervals and check the list below.
2. Reset the appliance:
o Switch off the appliance. / – Wait 5 seconds / –Switch the appliance on again.
3. If an error code is still displayed, contact an authorized Truma service center.
Error
Code
Flash Code
s = short = 0
l = long = 1
Error Description
1 s,s,s,s,s,s,s,l Flame not detected
There is a flame-detection error at the burner because the flame was not de-tected after
release of gas and ignition. Important: The system indicates this error only after three
attempts at intervals of approximately 30 seconds.
2 s,s,s,s,s,s,l,s
Error at over temperature switches
(EOS, BOS)
The exhaust over temperature switch (EOS) or burner over temperature switch (BOS) is
open/unplugged.
3 s,s,s,s,s,s,l,l Error at exhaust pressure switch (EPS)
The EPS did not close when the flue fan was actuated because the fan did not push
enough air through the exhaust channel. A cause could be, e.g., blocking of the exhaust
channel or a faulty switch. OR The EPS is closed even though the flue fan is not running.
Cause is a defective EPS or flue fan.
4 s,s,s,s,s,l,s,s
Error at water over tem-perature
switch (WOS)
The WOS opened at a water temperature of over 185 °F (85 °C).
5 s,s,s,s,s,l,s,l Flame detected at incorrect time
There is an error in flame detection of the burner because the flame was detected
– before ignition or
– before the release of gas or
– after the gas was switched off.
6 s,s,s,s,s,l,l,s Error in the safety circuit for gas valve
There is a heating request but gas cannot be released.
One of the switches WOS, EOS, BOS, EPS is open/unplugged.
7 s,s,s,s,s,l,l,l Error of burner MCU internal RAM
Error detected in the burner MCU’s internal safety monitoring feature (safety variables
are no longer correct or RAM/STACK was overwritten by mistake).
9 s,s,s,s,l,s,s,l
Malfunction of water outlet tempera-
ture sensor WOT
Water outlet temperature sensor WOT
– has a short circuit or
– is open/unplugged.
10 s,s,s,s,l,s,l,s Error in the safety circuit
There is a heating request but gas is not released because a valve-actuation signal was
not activated.
11 s,s,s,s,l,s,l,l Error of MCU watchdog gas release There is a heating request but the MCU watchdog does not release the gas path.
12 s,s,s,s,l,l,s,s Internal error
13 s,s,s,s,l,l,s,l Short circuit shut-off valve
Short circuit detection in the gas valve (shut-off part) detected a current > 1000 mA and
shut off.
16 s,s,s,l,s,s,s,s Malfunction of the MCU Internal error of the control unit.
20 s,s,s,l,s,l,s,s
Malfunction of water inlet tempera-
ture sensor WIT
Water inlet temperature sensor WIT
– has a short circuit or– is open/unplugged or
– the temperature of the sensor is colder than 14 °F (-10 °C).
21 s,s,s,l,s,l,s,l
Malfunction of circulation line tem-
perature sensor WCT
Circulation line temperature sensor WCT
– has a short circuit or– is open/unplugged or
– the temperature of the sensor is colder than 14 °F (-10 °C).
22 s,s,s,l,s,l,l,s
Malfunction of gas valve, modulation
section
Error at gas valve, modulation level, because
- the modulator has a short circuit or
- is open/unplugged.
23 s,s,s,l,s,l,l,l Voltage is too high The main power supply’s voltage detector measured a voltage level of >16.4 V.
24 s,s,s,l,l,s,s,s Voltage is too high The main power supply’s voltage detector measured a voltage level of <10 V.
25 s,s,s,l,l,s,s,l Flue fan current con-sumption error
The current detector for the flue fan has measured a current outside the permit-ted
limits.
26 s,s,s,l,l,s,l,s
Circulation pump current consump-
tion error
The current detector at the circulation pump has measured a current outside the per-
mitted limits.
27 s,s,s,l,l,s,l,l Water circulation pump is running dry.
The circulation pump does not generate water flow. The water system may not be filled
or not sufficiently vented.The circulation pump tries (20 times) to generate a water flow
every 30 s (if successful, the error is reset).