Dometic MCS6 User manual

Marine Air Conditioner
Operating manual . . . . . . . . . . . . . . . 3
Bootsklimaanlage
Bedienungsanleitung . . . . . . . . . . . . 36
Marine Climate System
Notice d’utilisation . . . . . . . . . . . . . . 75
Marine Climate System
Istruzioni per l’uso . . . . . . . . . . . . . 113
Marine Climate System
Instrucciones de uso . . . . . . . . . . . 150
Marine Climate System
Gebruiksaanwijzing . . . . . . . . . . . . 187
Klimatanläggning för båtar
Bruksanvisning . . . . . . . . . . . . . . . 223
Судовой кондиционер
Инструкция по эксплуатации. . . . 256
System klimatyzacji łodzi
Instrukcja obsługi. . . . . . . . . . . . . . 297
Lodní klimatizace
Návod k obsluze . . . . . . . . . . . . . . 336
Lodné klimatizačné zariadenie
Návod na obsluhu . . . . . . . . . . . . . 372
EN
DE
FR
IT
ES
NL
SV
RU
PL
CS
SK
Marine Climate
System
MCS6, MCS12,
MCS16

MCS6, MCS12, MCS16
2
1
2
8
3
9
4
7
6
5
1

EN
MCS6, MCS12, MCS16
3
Please read this instruction manual carefully before starting the appli-
ance and keep it in a safe place for future reference. If you pass on the
appliance to another person, hand over this operating manual along
with it.
Contents
1 Explanation of symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Target group for this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Proper use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5 Technical description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
6 Operating elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
7 Operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
8 Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
9 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
10 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
11 Guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
12 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
13 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

EN
Explanation of symbols MCS6, MCS12, MCS16
4
1 Explanation of symbols
!CAUTION!
Safety instruction: Failure to observe this instruction can lead to
injury.
ANOTICE!
Failure to observe this instruction can cause material damage and
impair the function of the product.
INOTE
Supplementary information for operating the product.
➤Action: This symbol indicates that action is required on your part. The
required action is described step-by-step.
✓This symbol describes the result of an action.
fig. 15, page 3: This refers to an element in an illustration. In this case,
item 5 in figure 1 on page 3.
2 Safety instructions
The manufacturer accepts no liability for damage in the following cases:
Faulty assembly or connection
Damage to the product resulting from mechanical influences and excess
voltage
Alterations to the product without express permission from the manu-
facturer
Use for purposes other than those described in the operating manual
2.1 General safety
!CAUTION!
Electronic devices are not toys!
Keep electrical appliances out of reach from children or infirm
persons.
Do not let them use the appliances without supervision.

EN
MCS6, MCS12, MCS16 Target group for this manual
5
Persons (including children) whose physical, sensory or mental
capabilities or lack of experience and knowledge prevents them
from using the appliance safely should not use this appliance
without initial supervision or instruction by a responsible person.
Use the device only as intended.
Do not make any alterations or conversions to the device.
Installation and repairing of the air conditioner may only be car-
ried out by qualified personnel who are familiar with the risks in-
volved and the relevant regulations. Inadequate repairs can
lead to considerable hazards. For repair service, please contact
the service centre in your country (addresses on the back).
3 Target group for this manual
This operating manual is for air conditioner users.
4 Proper use
The Marine Climate System is an air conditioning system designed for use
on boats or yachts. It can cool down or warm up the interior of the boat or
yacht.
5 Technical description
The Marine Climate Systems MCS6, MCS12 and MCS16 are marine air
conditioners which can be used for variable air conditioning inside a boat or
a yacht. They can cool and warm the room.
The Marine Climate System consists mainly of the air conditioning unit and a
control panel. A refrigerant gas is circulating through the system which is sea-
water cooled.

EN
Operating elements MCS6, MCS12, MCS16
6
6 Operating elements
6.1 Control Panel
Key to fig. 1, page 2:
Item Name Description
1 Power Button Press and release to toggle between the On
and Off Modes.
2Fan Button Press to advance through the available fan
settings. “1”(lowest) through “6” (highest) indi-
cates Manual Fan Speeds.
The letter “a” indicates automatic fan operation
selected.
3 Down Button Press and release to display the set point.
Press and hold the Down Button to decrease
the set point. Set point is decreased one
degree each time the button is depressed.
4 Faceplate sensor The faceplate sensor will read the room
temperature unless a remote air sensor is
installed.
5 Up Button Press and release to display the set point.
Press and hold the Up Button to increase the
set point. Set point is increased one degree
each time the button is depressed.
6 Display The inside air temperature is displayed when
the control is on. The set point is displayed
when either Up or Down Button is pressed.
The display also indicates program information
and fault codes.
When the control resumes operation after a
power interruption all the display LEDs will turn
on for one second. This is normal operating
condition and is referred to as Power On
Reset.
7 LED “Heat Mode” This LED is lit when
– the Heat Only Mode is selected
– or the unit is in a heating cycle.

EN
MCS6, MCS12, MCS16 Operating
7
6.2 Dual Button Functions
Up and Down Buttons
While in the On Mode: Simultaneously press the Up and Down Buttons
to display outside air temperature providing the optional outside air tem-
perature sensor is installed.
While in the Program Mode: Simultaneously press the Up and Down
Buttons to set new program defaults.
Power and Down Buttons
While viewing the service fault history log: Simultaneously press the
Power and Down Buttons to clear the fault history log (see “Service His-
tory Log” on page 13).
While in the On Mode: Simultaneously press the Power and Down
Buttons to enter the Moisture Mode (see “Moisture Mode” on page 10).
7 Operating
7.1 Initial startup
ANOTICE!
Do not turn the unit off and immediately turn it back on. Allow at
least 30 s for refrigerant pressure equalization.
➤Ensure seawater intake ball valve (seacock) is open.
➤Make sure the control is powered OFF.
➤Turn on air conditioner circuit breaker.
➤If the seawater pump has its own circuit breaker, turn that on too.
8 LED “Fan Indicator” This LED is lit when a Manual Fan Speed is
selected.
9 LED “Cool Mode” This LED is lit when
– the Cool Only Mode is selected
– or when the unit is in a cooling cycle.
Item Name Description

EN
Operating MCS6, MCS12, MCS16
8
➤Press the Fan Button (fig. 12, page 2).
✓This energizes the fan.
➤Verify that the fan is running and that there is steady airflow out of the sup-
ply-air grille.
➤Select a temperature set point lower than the current cabin temperature.
✓This starts the compressor and seawater pump.
➤Check for a steady solid stream of seawater from the overboard
discharge.
➤If the unit does not appear to be operating properly, refer to trouble-
shooting guidelines (“Troubleshooting” on page 23).
7.2 Overview
Power On
➤Press the Power button (fig. 11, page 2) once to engage the system.
✓The display indicates room temperature when the system is on and is
blank when the system is off.
Set Temperature
➤Press the Up or Down button (fig. 13 and 4, page 2) to set the desired
room temperature.
The set point can be viewed by momentarily pressing and releasing the
Up or Down button.
Fan Speed
Fan-speed operation is automatic, allowing fan speed to decrease as the set
point temperature is approached in the Cool Mode. The fan operates at low
speed when set point is satisfied.
➤Use the Fan button (fig. 12, page 2) to select manual fan speeds.
You can program the fan to run only when cooling or heating is required. Nor-
mally the automatic fan-speed operation is reversed in the Heating Mode,
however, the fan can be programmed to operate the same as in the Cooling
Mode.

EN
MCS6, MCS12, MCS16 Operating
9
Memory
The control’s nonvolatile memory requires no batteries or backup power.
When power is lost, the operating parameters are retained indefinitely. When
power is restored, the control resumes operating as last programmed.
7.3 Modes of Operation
Off Mode
When the Marine Climate System is in the Off Mode, all control outputs are
turned off. Program parameters and user settings are saved in nonvolatile
memory.
On Mode
When the Marine Climate System is in the On Mode, power is supplied to the
appropriate outputs and the display indicates the current state of operation.
The operating and program parameters resume based on those stored the
last time the unit was operating.
Cool Mode
When Cool Mode is selected, the Cool Mode LED is lit and the cooling
systems are operated as required. When the temperature drops below the
set point, the system will not automatically switch to the Heat Mode.
Heat Mode
When the Heat Mode LED is lit, only the heating systems are selected and
operated as required. Should the temperature rise above the set point, the
system will not automatically switch to the Cool Mode.
Automatic Mode
Automatic Mode provides both heating and cooling as required. The Heat or
Cool LED will be lit according to the mode required.
Temperature in a given mode is maintained within 2 °F (1.1 °C) of set point,
however a 4 °F (2.2 °C) difference is required to allow the Marine Climate
System to change modes.
Once the mode changes temperature will be maintained within 2 °F (1.1 °C)
of set point.

EN
Operating MCS6, MCS12, MCS16
10
Manual Fan Mode
Manual Fan Mode allows to select the desired fan speed manually. When a
manual fan speed has been selected, the Fan LED will be lit. Manual Fan
Mode is sometimes preferred when room temperature is constantly changing
due to varying heat loads.
The fastest fan speed is represented by “6”, the slowest represented by “1”.
➤Press and hold the Fan Button during normal operation to select one of
the six manual fan speeds available.
Circulation Mode
When the system is off at the control panel the fan can be used to only
circulate the air.
➤Press and hold the Fan Button when the display is off until the desired
speed number appears in the window.
➤Release the Fan Button
✓The fan will run at the selected speed circulating the air without heating or
cooling.
➤Press the Power Button once to cancel the Circulation Mode and enter the
On Mode.
Moisture Mode
➤While in the On Mode simultaneously press the Power and Down Buttons.
✓The first cycle will start in one minute.
➤Press the Power Button to end the Moisture Mode.
✓The “HU1” mnemonic code is displayed while in the Moisture Mode.
Program Mode
INOTE
The program mode can only be entered from the Off Mode.
The Program Mode is used to adjust the systems operating parameters to
suit the particular needs of individual users. The Program Mode is also used
to tailor the air conditioning system for the most efficient operation within an
installation.

EN
MCS6, MCS12, MCS16 Operating
11
Variables such as ducting, sensor location and system layout affect the
system operation. The Marine Climate System is shipped with factory default
settings which are stored in permanent memory and can be recalled at any
time.
7.4 Operating the Marine Climate System
ANOTICE!
Do not turn the unit off and immediately turn it back on. Allow at
least 30 s for refrigerant pressure equalization.
INOTE
When powering on the Marine Climate System, press and imme-
diately release the Power Button in order to not unintentionally en-
tering Program Mode.
If the Program Mode is entered unintentionally, any subsequent
presses of the Up or Down Button will change the P-1 parameter
setting, which can result in improper system operation.
➤Press the Power Button (fig. 11, page 2) shortly to engage the system.
✓The display indicates room temperature when the system is on and is
blank when the system is off.
➤Press the Down Button (fig. 13, page 2) or Up Button (fig. 15, page 2)
to choose the desired set point.
✓The display indicates room temperature when the system is on and is
blank when the system is off.
✓The thermostat is now set to maintain a constant temperature.
➤Set the desired room temperature by pressing the Up or Down Button.
The set point can be viewed by momentarily pressing and releasing the
Up or Down Button.
The Marine Climate System has nonvolatile memory requiring no batteries or
backup power. When power is lost the operating parameters are retained in-
definitely. When power is restored, the Marine Climate System resumes op-
erating as last programmed.
Automatic fan speed operation allows fan speed to decrease as room tem-
perature is approached in the Cool Mode. The fan will operate at low speed
when set point is satisfied.
Manual fan speeds can be selected with the Fan Button.

EN
Operating MCS6, MCS12, MCS16
12
The fan can be programmed to run only when cooling or heating is required.
Normally the automatic fan speed operation is reversed in the Heating Mode,
however, the fan can be programmed to operate the same as in the Cooling
Mode.
7.5 Automated Factory Self Test Program
The Marine Climate System software provides a self test program to facilitate
factory testing of the entire air conditioning system. Once the self test pro-
gram is activated, the test cycle will continue until the AC power is interrupted
or the Power Button is pressed once which returns the system to the Off
Mode.
➤Activate the self test program by pressing the Power Button while turning
on the AC power.
➤Release the Power Button while the display indicates “888” and all LEDs
are lit.
✓The Marine Climate System is now in the self test program.
✓“tSt” appears in the display while in the self test program.
Once activated the self test software will continuously execute the following
procedure:
Turn on in the Heat Mode and supply heating for 10 min.
Stop heating and run the fan only for 5 min.
Switch to Cool Mode and continue cooling for 10 min.
Stop cooling and run the fan only for 5 min.
Return to step one and continue until interrupted.
The self test program will continue until the power is interrupted or the test is
halted by pressing the Power Button once.

EN
MCS6, MCS12, MCS16 Operating
13
7.6 Service Tools
Hour Meter
Total compressor cycle time is saved in EEPROM every six minutes of con-
tinuous compressor running time. Cycles less than six minutes are discarded
to conserve memory and allow the most flexible hour-meter possible.
To view the hour meter proceed as follows:
➤Turn off the AC power.
➤Press the Down Button and hold it.
➤Restore AC power.
✓After Power-On Reset is complete, the following appears in the display:
– “Hr” is displayed for one second.
– The display blanks out for one second then displays the thousands of
hours for three seconds.
– The display blanks out for one second then displays the hundreds
units for three seconds.
✓The unit returns to the last operating state before power was removed.
Maximum recorded time is 65,536 hours, the meter stops and can only be
reset by a service technician.
Service History Log
The Marine Climate System records and remembers the eight most recent
faults. Each time a fault is detected, a one hour timer is started.
Three consecutive faults within that hour cause system shut down, lock out
and display the fault code. During that hour, to conserve memory, the same
recurring fault is not recorded in the service history log. Continuous operation
for one hour without the same recurring fault clears that fault counter but the
event remains in the service history log until overwritten. Should a different
fault be detected during the hour, it will be entered into the service history log.
The following events are entered into the service history log:
High Freon Pressure
Low Freon Pressure
Air Sensor Fault

EN
Programming MCS6, MCS12, MCS16
14
To view the service history log proceed as follows:
➤Turn off the AC power.
➤Press the Fan Button and hold it.
➤Turn on the AC power.
➤Once Power On Reset is completed (display indicates “888” and all LEDs
are lit) release the Fan Button.
✓The display will flash the most recent fault detected, followed by the event
chronology number.
➤To view other events detected press either the Up or Down Button.
➤To clear the service history log simultaneously press the Power and Down
Buttons.
➤To exit the service history log
– press either the Power, the Up or the Down Buttons or
– wait thirty seconds without pressing any button.
8 Programming
8.1 Entering Program Mode
➤Press and hold the Power Button while in the Off Mode until the letter “P”
appears in the display.
✓The characters “P1” followed by the parameter setting, appear in the
display.
✓The Marine Climate System is now in the Program Mode.
INOTE
The Marine Climate System will exit the Program Mode and return
to the Off Mode if no programming is attempted for one minute.
8.2 Changing Program Parameters
➤Increment from one program parameter to the next by pressing the Fan
Button.
➤Press the Up and Down Buttons to select the data or set the desired limits
for the parameter being programmed.

EN
MCS6, MCS12, MCS16 Programming
15
8.3 Saving New Program Parameters
INOTE
Factory defaults shown in the “Programmable Parameters Table”
on page 16 may be reset manually (see “Restore Memorized De-
fault Settings” on page 16).
➤Simultaneously press the Up and Down Buttons to save the new program
parameters.
✓This will set the new program defaults.
8.4 Exiting the Program Mode
There are two methods to exit the Program Mode.
➤Press the Power Button
✓The Marine Climate System will return to the Off Mode.
… or
➤Do not press any buttons and do not attempt any program changes for
one minute.
✓The Marine Climate System will exit the Program Mode.
8.5 Software Identification
The software version of the Marine Climate System is identified for one sec-
ond prior to the exit from the Program Mode. The software identification num-
ber, e.g. (“A12”) will appear in the display for one second, then the Marine
Climate System will return to the Off Mode.
INOTE
Should there be any reason to contact Dometic about the system
or programming the Marine Climate System be sure to have the
software identification number and air conditioning unit serial num-
ber available. The serial number may be found on the typeplate.

EN
Programming MCS6, MCS12, MCS16
16
8.6 Restore Memorized Default Settings
The memorized default settings can be restored as follows.
➤Enter the Program Mode.
➤Set P-17 to “rSt”.
➤Exit the Program Mode.
✓The software version number (e.g. “A12”) appears in the display.
✓The memorized default settings are restored and the Marine Climate Sys-
tem returns to the Off Mode.
8.7 Programmable Parameters
Programmable Parameters Table
Program
number Description Default Range
P-1 Operating Mode 0 0= Automatic mode
1= Cool only mode
2= Heat only mode
P-2 High Fan Speed Limit
(arbitrary units)
95 65 – 95
P-3 Low Fan Speed Limit
(arbitrary units)
55 30 – 64
P-4 Compressor Staging
Time Delay
15 5 – 135 s
P-5 Temperature Sensor
Calibration
Ambient
Temperature
Ambient 10 °F
P-6 Failsafe 3 0= Minimum protection
1= Continuous, no display
2= Continuous, with display
3= Four failures, reset required
P-7 Low AC Voltage Shut-
down (Volts)
115 V – OFF
220/230 V – OFF
75 – 105
175 – 205
P-8 De-Icing Cycle 1 OFF
1= On with 5 °F faceplate sensor
differential
2= On with 7 °F faceplate sensor
differential
P-9 High Water Tempera-
ture Limit (°F)
OFF 100 – 150

EN
MCS6, MCS12, MCS16 Programming
17
INOTE
Should any programming problems or confusion occur, reset the
Memorized Default Settings by entering the program mode and
setting P-17 to “rSt”.
If recent programming changes were made but not saved, the reset
will return to the last saved defaults, which could differ from the
factory defaults.
P-10 Display Brightness
Control
94= Low
13 = Maximum
P-11 Display ºF or ºC F F= Fahrenheit displayed
C= Celsius displayed
P-12 Cycle Pump With
Compressor or
Continuous Pump
OFF OFF = Cycle with compressor
On = Continuous pump
P-13 Reverse Fan Speeds
During Heating Mode
rEF nor = Normal fan operation
rEF = Reversed fan in heating
P-14 Continuous Fan or
Cycle Fan with
Compressor
con CYC = Cycle fan with compressor
con = Continuous fan operation
P-15 Reverse Cycle Heating
or Electric Heat Only
Option Installed (cool-
ing only units)
nor nor = Reverse cycle heating
ELE = Electric heater installed
P-16 Fan Motor type selec-
tion Shaded Pole or
Split Capacitor.
SC SP = Shaded pole fan motor
SC = Split capacitor fan motor
P-17 Reset Memorized
Programming Defaults
nor rSt = Reset defaults
nor = Normal
P-18 Reserved for Future
Option
––
P-19 Reserved for Future
Option
––
P-20 Filter Threshold
(x10 hours)
00 00 – 250
P-21 Current Filter Time
(x10 hours)
x10 Hours Using
Current Filter
–
P-22 Voltage Calibration
(Volts)
AC Voltage –
Program
number Description Default Range

EN
Programming MCS6, MCS12, MCS16
18
P-1: Operating Mode
The following operating modes can be selected:
Automatic Mode by selecting “0”
Cool Only Mode by selecting “1”
Heat Only Mode by selecting “2”.
P-2: High Fan Limit
The upper fan speed limit can be adjusted for various motors. The high fan
limit is adjusted with the system installed and operating. The values range
from 65 through 95, arbitrary units.
➤Use the Up and Down Buttons to select the desired speed.
– Increase the number for a higher fan speed.
– Decrease the number to lower the fan speed.
P-3: Low Fan Limit
The low fan limit determines the lowest output allowed for the low fan speed.
The values range from 30 through 64, arbitrary units.
➤Use the Up and Down Buttons to select the low fan limit.
– Increase the number for a higher fan speed.
– Decrease the number to lower the fan speed.
INOTE
Once the high and low fan speed limits are set, the unit will auto-
matically readjust the remaining speeds to produce three equally
spaced fan speeds in both Automatic and Manual Fan Modes.
P-4: Compressor Staging Time Delay
The compressor staging delay is provided for installations where more than
one system operates from the same power source. Setting different staging
delays allows compressors to start at different times when power is inter-
rupted.
Units should be staged 5 s apart. The minimum delay is 5 s and the maxi-
mum is 135 s.

EN
MCS6, MCS12, MCS16 Programming
19
P-5: Temperature Calibration
Use this feature to calibrate the ambient sensor.
➤Select P-5.
✓The ambient temperature appears in the display.
➤Use the Up and Down Buttons to set the correct reading.
✓The temperature in the display will increase or decrease as required.
P-6: Failsafe Level
There are four failsafe levels (see “Failsafe and Fault Handling Codes” on
page 26).
P-7: Low AC Voltage Shutdown
Use this feature to shut down the unit if the voltage drops to a dangerously
low level.
By default it is off, but it can be set from 175 – 205. This feature works imme-
diately at start up, but while running will require a 5 min delay before display-
ing a fault to prevent nuisances.
The fault code is “LAC”.
P-8: De-Icing Cycle
The Marine Climate System is equipped with a de-icing cycle to prevent ice
build up on the evaporator coil during extended periods of cooling operation.
Installation variables such as grille sizes, length of ducting, insulation R fac-
tors and ambient temperatures determine the cooling run time required to
achieve set point. Customer usage may substantially increase run times by
operating the system with the hatches and doors open.
Programming an unrealistic set point (e.g. 65 °F/18.3 °C) and leaving the
salon door open will usually cause the evaporator to ice up on warm humid
days.
De-icing is accomplished by using an algorithm that closely monitors the
room air temperature in repeating 10 min intervals during a cooling cycle.

EN
Programming MCS6, MCS12, MCS16
20
The de-icing feature has two different, selectable behavior modes when it is
used in conjunction with the control panel’s built-in room air temperature sen-
sor. It attempts to compensate for any temperature discrepancy that the face-
plate sensor may experience. Although this discrepancy is not typical,
installation variables such as where the control panel is placed inside the
room (e.g. near an open door or in direct sunlight) can affect how accurately
it can read the actual room temperature.
By default with P-8 set to “1” (ON), the algorithm is applied assuming the
faceplate sensor may be reading the room temperature as much as 5 °F
(2.8 °C) greater than the actual evaporator temperature.
With programmable parameter P-8 set to “2”, the temperature differential that
is applied to the faceplate sensor reading is increased to 7 °F (3.9 °C) for
even more extreme installations. Setting P-8 to “2” should only be used if a
setting of “1” does not prevent evaporator ice from forming.
Alternately, the installation of an optional alternate air temperature sensor
(located in the return air path) will greatly increase the effectiveness of the
de-icing feature, and this option should be considered whenever the face-
plate sensor cannot read the room temperature accurately.
P-9: High Water Temperature Limit
Use this feature to shut down the unit if the water in condenser coil rises to a
dangerously high level.
By default it is off, but it can be set between 100 and 150 °F.
The fault code is “PLF”.
P-10: Display Brightness Control
The display brightness can be adjusted from 4 (dimmest) to 13 (brightest).
P-11: Fahrenheit or Celsius Selection
The default setting is “°F”. Select “°C” for Celsius. Celsius readings are dis-
played in tenths, e.g. 22.2°.
P-12: Cycle Pump With Compressor
The pump can also be programmed to operate continuously or cycle on de-
mand.
➤To program continuous operation select “On”.