Truma VarioHeat CP PLus controller Camper Interiors Instruction Manual
- June 5, 2024
- Truma
Table of Contents
VarioHeat CP PLus controller Camper Interiors
Truma CP plus VarioHeat
Operating instructions To be kept in the vehicle. This document is part of the
product.
Table of contents
Consumer Safety Information
Safety Definitions …………………………………………………………… 3 Safety Behavior and Practices
………………………………………….. 3 Intended use ……………………………………………………………….. 3 Important notes
…………………………………………………………… 3
California Proposition 65 lists chemical substances known to the state to cause cancer, birth defects, death, serious illness or other reproductive harm. This product may contain such substances.
Operating Instructions
4010007
Display and Operating Elements …………………………………. 4 Description ……………………………………………………………………. 4 Rotary push button …………………………………………………………. 4 Back button …………………………………………………………………… 4 Initial start-up ………………………………………………………………… 4 Start-up …………………………………………………………………………. 5 Functions ………………………………………………………………………. 5 Select setting level ………………………………………………………….. 5 Switch on / off ……………………………………………………………….. 5 Change the room temperature …………………………………………. 5 Select the fan level …………………………………………………………. 6 Change hot water mode …………………………………………………. 7 Set the time switch …………………………………………………………. 7 Set clock ……………………………………………………………………….. 9 Service menu …………………………………………………………………. 9 Special displays ……………………………………………………………. 11 Warning / Error …………………………………………………………….. 11 Warning ………………………………………………………………………. 11 IR remote control ………………………………………………………. 12 Maintenance ……………………………………………………………… 12 Troubleshooting charts …………………………………………….. 14 VarioHeat (H) ……………………………………………………………….. 14 AquaGo (W) …………………………………………………………………. 14 Aventa eco / comfort …………………………………………………….. 16
Trademark information
Truma CP plus VarioHeat control panel referred to as CP plus VarioHeat below.
Truma AquaGo referred to as AquaGo below. Truma VarioHeat comfort referred to
as VarioHeat below. Aventa eco and Aventa comfort referred to as Aventa below.
VarioHeat is a furnace. For technical reasons they it referred to as “HEATING”
in the display text.
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly could result in serious injury,
death or property damage.
Do not store or use gasoline or other flammable vapors and liquids in the
vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
· Evacuate all persons from the vehicle. · Shut off the gas supply at the gas
container
or source. · Do not touch any electrical switch or use
any phone or radio in the vehicle. · Do not start the vehicle’s engine or
electric
generator. · Contact the nearest gas supplier or certified
service technician for repairs. · If you cannot reach a gas supplier or certi-
fied service technician, contact the nearest fire department. · Do not turn on
the gas supply until gas leaks have been repaired.
Installation and service must be performed by a certified service technician,
service agency, or the gas supplier.
2
Consumer Safety Information
Safety Definitions
This is the safety alert symbol. This symbol alerts you to potential hazards
that can kill or hurt you and others.
indicates a hazardous situation which, if not avoided, could result in death
or serious injury.
is used to address practices not related to physical injury.
Other important information or tips.
Safety Behavior and Practices
· Use the CP plus VarioHeat only when it is in a technically sound condition.
· Have a specialist immediately remedy any malfunctions. Remedy the
malfunction yourself only if a remedy is specified in the troubleshooting
chart in these operating instructions.
· Have a defective CP plus VarioHeat repaired only by the manufacturer or its
service department.
· Any alteration to the appliance or its controls can be dangerous and will
void the warranty.
Intended use
The CP plus VarioHeat is suitable only for installation in RVs used for
recreation, travel, or camping.
The CP plus VarioHeat controls and monitors the following appliances: ·
VarioHeat · AquaGo · Aventa eco / comfort
Important notes
· If the power supply to the system has been interrupted, the time / time
switch must be reset.
· If a new or replacement appliance (furnace, air conditioning system or hot
water system) is connected to the bus system, the procedure described in
“Initial start-up” must be repeated.
· Switch OFF the VarioHeat furnace and/or AquaGo when refueling, pumping gas or when the recreational vehicle (RV) is in a parking garage, on a ferry, or in enclosed spaces (such as a garage, repair shop). Make absolutely sure that the VarioHeat furnace and/or AquaGo cannot be switched on via the time switch. To do this, you have to switch the CP plus VarioHeat off or interrupt the power supply to the control panel.
3
Operating Instructions
Display and Operating Elements Rotary push button
hot eco
6 7
9
The rotary push button (8) is used to select and change setpoints and
parameters; it is then tapped to save the values. Selected menu items 1 flash.
2
- 3 5
Turn clockwise · The menu is scrolled
through from left to right · Increase values (+)
4
8
Turn counterclockwise · The menu is scrolled
through from right to left · Reduce values (-)
Fig. 1
1 Display 2 Status line 3 Menu line (top) 4 Menu line (bottom) 5 Power supply
display
120 V AC (mains supply) 6 Time switch display 7 Settings/Values (displayed
text) 8 Rotary push button 9 Back button
Description
· A rotary push button (8) is used to select menu items in the menu lines (3 +
4) and to adjust settings.
· Information is shown on a backlit display (1).
· The back button (9) is used to go back to a previous menu.
Tap · Save a selected value · Select a menu item, go
to the setting level
Press and hold · Main switching function
control panel on/off.
Back button
Press the back button (9) to go back to a previous menu and cancel settings.
This means that the previous values remain unchanged.
Initial start-up
Perform the following steps for initial start-up: 1. Switch on the power
supply.
12 V DC for the CP plus VarioHeat and furnace, air conditioning system or
hot water system
2. Start searching for the appliances in the menu item “Service menu” >
“RESET” > “PR SET”.
When you have confirmed the selection, the CP plus VarioHeat is initialized. “INIT ..” appears on the display while this is in progress. This stores the devices that have been found in the control panel.
4
Start-up
Start / Stand-by screen When the CP plus VarioHeat is connected to the power
supply, a start screen is displayed after a few seconds.
Switch off · Press the rotary push button for more than
4 seconds.
The switch off process of the CP plus VarioHeat may take a few minutes due to
internal time lags of the furnace, air conditioning system or hot water system
(“OFF” is displayed during this time).
Fig. 2
· The display alternates between the current time and the room temperature
that you set.
· Special displays on command via CI-BUS (refer to “Special displays” on page
11).
· After repairs or upgrades, “initial startup” has to be repeated.
Functions
The functions of menu lines (Fig. 1 3, 4) of the CP plus VarioHeat can be
selected in any sequence. The operating parameters are shown in the status
line (Fig. 1 2) or in the display (Fig. 1 6).
Select setting level
Change the room temperature
· Use the rotary push button (Fig. 1 – 8) to select the icon in the menu line
(Fig. 4 3).
· Tap the rotary push button to go to the setting level.
· Use the rotary push button to select the furnace (“HEATER”) or air
conditioning system (“AC”).
· Tap the rotary push button to confirm the selection.
· Use the rotary push button to select between “OFF”, “VENT”, “COOL”, “AUTO”.
· Push rotary push button to confirm the selection.
· Select the desired temperature with the rotary push button.
· Tap the rotary push button to confirm the value.
ab c
d
e
· Tap the rotary push button.
2 The display shows the setting level. The first
icon flashes.
3
Fig. 4
Fig. 3
Switch on / off
Furnace (“HEATER”) Adjustable temperature range 40 86 °F (1 °F increments)
or 5 30 °C (1 °C increments) a = Furnace on icon is lit;
the icon flashes until the room temperature is reached.
Switch on · Tap the rotary push button.
Previously set values and operating parameters are active again when the panel
is switched on.
5
Air conditioning system (“AC”) Adjustable temperature range 60 – 88 °F (1 °F increments) or 16 31 °C (1 °C increments)
f g hi j k
Air conditioning system can also be operated with IR remote, see page 12.
Icon Displayed text
b COOL
c
AUTO 1
d NIGHT
d VENT
Description
Air conditioning system is switched on Air conditioning system is set to
automatic Air conditioning system is set to silent mode Air conditioning
system is in air circulation mode
1 Symbol flashes until the desired room temperature is reached.
Quick temperature change possible using rotary push button (in stand-by
screen).
Automatic climate control (“AUTO”) Adjustable temperature range 64 – 77 °F (1
°F increments) or 18 – 25 °C (1 °C increments)
Automatic changeover between furnace and air conditioning system for an
approximately constant temperature inside the vehicle.
e = AUTO Automatic climate control is activated
Requirements for operation with automatic climate control: · The furnace and
air conditioning system
must be connected. · Automatic climate control (ACC) must be
activated in the service menu (see “Service menu” page 9).
2 3
Fig. 5
The temperature range below 41 °F (5 °C; “OFF”) must be selected in order to
switch off the furnace.
Furnace (“HEATER”)
Icon Displayed text
OFF
g ECO
h
HIGH
i
BOOST
Description
Fan is switched off. (only selectable if no appliance is in operation).
Low fan level
High fan level
Rapid room heating Available if the difference between the selected and actual
room temperature is >10 °C (depends on connected heating appliance)
When the furnace is switched on (room temperature set), the fan level selected in the previous heating process is shown in the status line (Fig. 1 2). The default setting is “AUTO”.
Select the fan level
With a furnace / AC connected
1. Use the rotary push button to select the icon in the menu line (Fig. 5
3).
2. Tap the rotary push button to go to the setting level.
3. Select the desired fan level with the rotary push button.
4. Tap the rotary push button to confirm the value.
6
Air conditioning system (“AC”)
Hot water mode
Air conditioning system can also be operated with IR remote, see page 12.
Icon
g
Displayed text OFF
LOW
Description
Fan is switched off (can be selected only if no appliance is in operation).
Low fan level
h MID
i
HIGH
j
NIGHT
Medium fan level
Highest fan level
Ultra-quiet fan operation for both the indoor and outdoor fans (only available
in cooling mode)
Change hot water mode
1. Use the rotary push button to select the icon in the menu line (Fig. 6
3).
2. Tap the rotary push button to go to the setting level.
l
mn
Icon Displayed Description
text
OFF
AquaGo is switched off.
l
ECO
The AquaGo is now running in energy-saving mode.
m COMFOR The AquaGo is now running in a mode that provides rapid availability of hot water.
n
ANTIFR Prevention of freezing using
12 V DC electricity:
Operating mode with installed electric antifreeze kit (available as an accessory) and appliance switched on. The temperature in the appliance is automatically kept above 41 °F (5 °C).
During operation, the icon is flashing.
Set the time switch
eco
eco
3
Fig. 6
If the warning “CLEAN” is displayed, the AquaGo must be decalcified (see “2.2
CLEAN” page 10).
3. Select the desired hot water mode with the rotary push button.
4. Tap the rotary push button to confirm the selection.
5. Select the desired hot water temperature with the rotary push button 95 –
120 °F (35 – 49 °C).
6. Tap the rotary push button to confirm the value.
Risk of carbon monoxide poisoning. The enabled time switch switches the
furnace on, even when the recreational vehicle (RV) is parked. The exhaust gas
from the furnace can cause poisoning in enclosed spaces (e.g. garages, repair
shops).
If you park the RV in an enclosed space:
1. Block the fuel supply (gas) to the furnace.
2. Disable the time switch of the CP plus VarioHeat (OFF).
3. Switch off the furnace on the CP plus VarioHeat .
If the time switch is “ON”, the “Disable time switch (“OFF”)” menu is
displayed.
1. Use the rotary push button to select the icon in the menu line (Fig. 1
4).
2. Tap the rotary push button to go to the setting level.
7
Enter start time Use the rotary push button to set the hours and then the minutes.
24 h mode
12 h mode
2. Tap the rotary push button to confirm the value.
Fig. 7
Fig. 8
= a. m. = p. m.
Enter end time Use the rotary push button to set the hours and then the minutes.
24 h mode
12 h mode
Fig. 9
= a. m. = p. m. Fig. 10
If the start/end time is earlier than the time when you entered the settings, the operating parameters are not active until the next start/end time is reached. Until then, the operating parameters set outside the time switch remain valid.
Fig. 12
Select the hot water temperature
1. Select the desired hot water mode with the rotary push button.
2. Tap the rotary push button to confirm the selection.
3. Select the desired hot water temperature with the rotary push button 95 –
120 °F (1 °F increments) or 35-49 °C (1 °C increments).
4. Tap the rotary push button to confirm the value.
Enable time switch (“ON”) 1. Enable the time switch (ON) with the rotary
push button 2. Tap the rotary push button to confirm the
value.
2
Set room temperature 1. Depending on the connected appliance, use
the rotary push button to choose between furnace or AquaGo. 2. Tap the rotary
push button to confirm the selection. 3. Select the desired room temperature
with the rotary push button. 4. Tap the rotary push button to confirm the
value.
Fig. 13
The time switch remains enabled, even for several days, until it is disabled
(“OFF”). If the time switch is programmed and enabled, the time switch icon
flashes.
Disable time switch (“OFF”) 1. Tap the rotary push button to go to the set-
ting level. 2. Disable the time switch (“OFF”) with the ro-
tary push button 3. Tap the rotary push button to confirm the
value.
Fig. 11
Select fan level 1. Select the desired fan level with the rotary
push button.
8
2. AC SET (Only available if ACC is set to “ON”)
Fig. 14
Set clock
Display 24 h mode Display 12 h mode
Fig. 15
4
4
= a. m. = p. m.
Fig. 16
Use the rotary push button (Fig. 1 8) to select the “Set clock” icon in the
menu line (Fig. 1 – 4).
The hour display flashes.
1. Use the rotary push button (Fig. 1 8) to set the hours.
2. Tap the rotary push button again and the minute display flashes.
3. Use the rotary push button to set the minutes.
4. Tap the rotary push button to confirm the value.
Service menu
1. Calibrate room temperature sensor of the furnace (“OFFSET”) The room
temperature sensor of the connected furnace can be adjusted individually to
suit the location of the sensor. Settings can be made in the range from 41 °F
to 23 °F (5 °C to -5 °C) in 1 °F (0.5 °C) increments.
The sensed room temperature can during operation of the automatic climate control be perceived differently during cooling than during heating. “AC SET” is used to set an offset between cooling and heating. The setting can be made in increments of 1 °F (0.5 °C) within the range of 0 °F to 10 °F (0 °C to 5 °C).
Fig. 24
Example: Set room temperature 74 °F; AC SET = 2 °F Setpoint value for air
conditioning
system = 76 °F
Presetting: +2 °F (+1 °C).
3. ACC (Only available if the air conditioning system and furnace are connected)
The automatic climate control function AUTO is activated or blocked with
“ACC”.
ON The automatic climate control function AUTO is activated. Automatic
climate control function AUTO can be selected in the Room temperature menu.
“AC SET” appears in the Service menu.
OFF The automatic climate control function AUTO is blocked.
Fig. 25
Presetting: OFF
The function of the Truma automatic climate control depends on proper
installation.
4. AquaGo
Fig. 17
Example: Set room temperature 75 °F; OFFSET = -1 °F; Setpoint for furnace = 74 °F
Available only when AquaGo is connected.
4.1 CALCI
Indicates the relative level of calcification of the AquaGo as a percentage.
Default setting: 0 °F (0 °C).
With 100 % calcification, the warning “CLEAN” is displayed in the Hot water
mode menu (see “Change hot water mode” page 7) and the AquaGo must be
decalcified.
9
4.2 CLEAN (Only AquaGo comfort / AquaGo comfort plus.)
Irritation of skin and eyes in case of contact with decalcification agent Wear
protective gloves, eye protection and face protection to avoid contact.
The directions in the AquaGo operating instructions must be followed.
Starts or stops the decalcification process.
The AquaGo operating instructions contain a complete description of the
decalcification process (see “Decalcification”).
Start = starting decalcification Stop = interrupting decalcification
Fig. 18
Default setting: °C (Celsius). 6. Change backlighting Change the backlighting
of the CP plus VarioHeat in 10 increments.
hot
When the decalcification process is interrupted, the AquaGo is automatically
rinsed and can be used only after this.
4.3 HARDN
Fig. 19
7. 12 h / 24 h Mode Display in 12 h (a. m., p. m.) / 24 h mode.
The appliance must be decalcified regularly depending on water hardness and hot water consumption.
Specify the hardness of the water that is used. Is needed to display the
relative calcification of the AquaGo (see “2.1 CALCI”).
Default = 1
Fig. 20 Default setting: 24 h mode
Level 1 2 3 4
Water hardness (mg/l CaCO3)
Soft 0 – 60
Moderately hard 61 – 120
Hard 121 – 180
Very hard > 180
6. Change language Select the desired language (German, English, French,
Italian).
hot
Fig. 21 Default setting: English
5. °C / °F temperature display Select temperature display °C (Celsius) or °F (Fahrenheit).
8. Show the version number Display the version number of the furnace, AquaGo and CP plus VarioHeat .
10
Example:
a
H 1.20.01 > H = appliance;
1.20.01 = Version number
Fig. 22
Appliance P = CP plus VarioHeat,
CP plus VarioHeat CI-BUS H = VarioHeat W = AquaGo
Fig. 24
Warning / Error
9. RESET The reset function resets the CP plus VarioHeat to the factory
settings. All your settings are deleted. Newly connected devices are
recognized and recorded in the control panel.
· Switch on the power supply 12 V DC for the CP plus VarioHeat and VarioHeat
furnace
Reset 1. Select “RESET” with the rotary push
button (Fig. 1 8). 2. Tap the rotary push button. 3. “PR SET” is shown in
the display. 4. Tap the rotary push button to confirm.
Warning
If an operating parameter is outside the target range, the CP plus VarioHeat
immediately jumps to the “Warning / Error” menu level and displays the
respective fault code. The cause of the warning can be determined and remedied
with the aid of the troubleshooting guide (from page 14 and ff).
Return to setting level · Tap the rotary push button or press the back
button. If the display is in stand-by mode, tap to activate the background
lighting and tap again to acknowledge the warning.
If possible, the appliance concerned continues to operate. When the operating parameter is within the target range again, this icon extinguishes again automatically.
Fig. 23
When you have confirmed the selection, the CP plus VarioHeat is initialized.
“INIT ..” appears on the display while this is in progress.
Special displays
Display warning code 1. Select the icon (“Fig. 25”) with the rotary
push button. 2. Tap the rotary push button.
The code of the current warning is displayed. The troubleshooting chart
(refer to “Troubleshooting” on page 14 and ff) can be used to determine the
cause of the warning and remedy the error.
External control panel (CI-BUS)
If a command is sent from an external control
panel with CI-BUS, “CI” is displayed.
a
The CP plus VarioHeat CI-BUS is a separate
variant that is fitted only in the factory.
Fig. 25
Display energy type In heating mode, gas (a) is shown as the energy type
11
Fig. 26
W = Warning 28 = Error code H = Appliance
H = VarioHeat W = AquaGo
Malfunction In the event of an error, the CP plus VarioHeat immediately jumps to the “Warning / Error” menu level and displays the respective fault code. The cause of the error can be determined and remedied with the aid of the troubleshooting guide (from page 37 and ff).
Fig. 27
E =Error 2 =Error code H =Appliance
H = VarioHeat W = AquaGo
IR remote control
Air conditioning systems shared use of IR remote control and CP plus
VarioHeat · Even after connecting the CP plus VarioHeat,
the IR remote control is still available to control the air conditioning
system. The CP plus VarioHeat recognises all settings (except dehumidification
mode) that are made on the air conditioning system using the IR remote
control. The IR remote control only transmits the settings that are shown in
its display (no bidirectional communication). · Only the time switch of the CP
plus VarioHeat may be used to clearly define the start and end time of a
required period.
Maintenance
The CP plus VarioHeat is maintenance-free.
Cause remedied / return to setting level · Tap the rotary push button.
The respective appliance is restarted.
To clean the front, you can use a non-abrasive cloth moistened with water (and a neutral soap solution).
This may take a few minutes due to internal time lags of connected appliances. If the cause was not remedied, the malfunction will occur again and the control panel will again go to the “Warning / Error” menu level.
Cause not remedied / return to setting level · Press the back button.
In this case, the error is not acknowledged in the CP plus VarioHeat and the warning icon (Fig. 25) remains. The appliance remains in error status. Other connected appliances can be operated.
Reading out the error fault code When the error has been acknowledged, the fault code can be opened again:
1. Select the warning symbol (Fig. 25) with the rotary push button.
2. Tap the rotary push button. The current error fault code is displayed.
12
Technical data
Display
LCD, monochrome, with backlighting
Diagonal 3.3 in.
(84 mm)
Dimensions (L x W x H)
3.62 x 4.06 x 1.58 in. (92 x 103 x 40 mm)
Operating temperature range
13 °F to 140 °F
(-25 °C to +60 °C)
Storage temperature range
13 °F to 158 °F
(-25 °C to +70 °C)
Interface
TIN bus CI-BUS (only CI-BUS model)
Power supply
8 16.5 V DC
Power consumption
max. 65 mA (100% backlighting) 10 mA (stand-by)
Quiescent current
3 mA (Off)
Weight
approx. 0.22 lb
(approx. 100 g)
Protection class
Class III
Protection type
IP00
Subject to change without notice.
13
Troubleshooting charts
VarioHeat (H)
Error code E 2 H, E 16 H
W 25 H
Potential cause
Flame not detected: Gas cylinder empty
Gas cylinder or quick-acting valve in the gas supply line closed
Butane concentration in the gas cylinder too high
Combustion air infeed or exhaust gas outlet closed
Excess voltage > 16.4 V DC
Solution Replace gas cylinder
Check the gas infeed and open the valves
Use propane. Butane is not suitable for heating, especially at temperatures
below 50° F (10 °C) Check openings for dirt (slush, ice or leaves) and remove
Check battery voltage and power sources, such as battery charger
W 26 H
Undervoltage, battery voltage Charge the battery, replace old battery
too low < 10 V DC
W 27 H
Warm air outlets blocked
Remove blockage
Circulated air intake blocked
Remove blockage
EN end outlet closed
Open EN end outlet
W 29 H
Imminent undervoltage, battery Charge battery voltage too low < 10.4 V C
W 255 H
Furnace has no 12 V DC power Ensure 12 V DC power supply
supply
No connection between furnace Connect furnace and control panel and control panel
If these measures do not remedy the malfunction or if error codes are displayed that you cannot
find in the troubleshooting chart, contact your dealership, Truma Service 1-855-558-7862 or one of
our authorized Service Partners.
AquaGo (W)
Error code E 1 W
E 2 W E 3 W
E 4 W
Potential cause
Solution
Flame not detected
There is a flame-detection error at the burner because the flame was not detected after release of gas and ignition. Important: The system indicates this error only after three attempts at intervals of approximately 30 seconds.
Error at over temperature switch- The exhaust over temperature switch (EOS) or
es (EOS, BOS)
burner over temperature switch (BOS) is open/
unplugged.
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.
Error at water over temperature The WOS opened at a water temperature of
switch (WOS)
over 185 °F (85 °C).
14
Error code E 5 W
E 6 W
E 7 W
E 9 W
E 10 W E 11 W W 12 W W 13 W W 16 W W 20 W
W 21 W
E 22 W W 23 W W 24 W E 25 W W 26 W
Potential cause Flame detected at incorrect time
Error in the safety circuit for gas valve
Error of burner MCU internal RAM
Malfunction of water outlet temperature sensor WOT
Error in the safety circuit
Error of MCU watchdog gas release Internal error Short circuit shut-off valve
Malfunction of the MCU Malfunction of water inlet temperature sensor WIT
Malfunction of circulation line temperature sensor WCT
Malfunction of gas valve, modulation section Voltage is too high Voltage is
too low Flue fan current consumption error Circulation pump current
consumption error
Solution
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.
There is a heating request but gas cannot be released. One of the switches
WOS, EOS, BOS, EPS is open/unplugged.
Error detected in the burner MCU’s internal safety monitoring feature (safety
variables are no longer correct or RAM/STACK was overwritten by mistake).
Water outlet temperature sensor WOT has a short circuit or is open/unplugged.
the temperature of the sensor is colder than 14 °F (-10 °C).
There is a heating request but gas is not released because a valve-actuation
signal was not activated.
There is a heating request but the MCU watchdog does not release the gas path.
Short circuit detection in the gas valve (shutoff part) detected a current >
1000 mA and shut off.
Internal error of the control unit.
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).
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).
Error at gas valve, modulation level, because the modulator has a short
circuit or is open/unplugged.
The main power supply’s voltage detector measured a voltage level of >16.4 V.
The main power supply’s voltage detector measured a voltage level of <10 V.
The current detector for the flue fan has measured a current outside the
permitted limits.
The current detector at the circulation pump has measured a current outside
the permitted limits.
15
Error code W 27 W
W 28 W
Potential cause Water circulation pump is running dry.
Too low gas pressure.
Solution
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).
Gas supply (in vehicle) to the appliance insufficient.
W 29 W W 30 W W 31 W W 32 W W 33 W
Too high heat power required. Risk of freezing. Decalcification finished. Current too low. Current too high.
You are trying to use more hot water than the appliance can supply.
Temperature in the appliance below 27 °F (3 °C).
Current in the antifreeze kit too low (e.g. cable break).
Current in the antifreeze kit too high (e.g. short circuit).
If these measures do not remedy the malfunction or if error codes are displayed that you cannot find in the troubleshooting chart, contact your dealership, Truma Service 1-855-558-7862 or one of our authorized Service Partners.
Aventa eco / comfort
Error code
34, 47
Cause
Unstable 120 V power supply in connection with generator or inverter operation
Remedy
Ensure shore power supply 120 V at the unit input
If none of the measures in the troubleshooting chart proves successful or fault codes are displayed that cannot be found in the troubleshooting chart, please contact the Truma Service Center at 1-855-558-7862 or one of our authorized service partners.
16
17
18
19
In case you encounter any problems, please contact the Truma Service Center at
855-558-7862 or one of our authorized
service partners. For details see www.truma.net.
Please have the model number and serial number (on type plate of appliance)
handy when you call.
39050-00701 · 00 · 11/2021 · ©
Manufacturing Truma Gerätetechnik GmbH & Co. KG Wernher-von-Braun-Straße 12 85640 Putzbrunn Germany www.truma.com
Sales
Truma Corp
2800 Harman Drive
Elkhart, IN 46514
USA
Toll Free 1-855-558-7862
Fax
www.truma.net