Dometic MCS T6, MCS T12, MCS T16 Operating Manual
EN
DEFRNL
CLIMATE
AIR CONDITIONERS
MCS T6, MCS T12, MCS T16
Marine Air Conditioner
Operating manual . . . . . . . . . . . . . . . . . . . . . 4
Bootsklimaanlage
Bedienungsanleitung . . . . . . . . . . . . . . . . .38
Climatiseur pour bateau
Notice d’utilisation . . . . . . . . . . . . . . . . . . .77
Bootairco
Gebruiksaanwijzing. . . . . . . . . . . . . . . . . . 117
MCS T6, MCS T12, MCS T16
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MCS T6, MCS T12, MCS T16
Please read this instruction manual carefully before first use, and store it in
a safe place. If you pass on the product to another person, hand over this
instruction manual along with it.
Contents
1 Explanation of symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
3 Target group for this manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
4 Proper use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
5 Technical description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
6 Operating elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
7 Operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
8 Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
9 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
10 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
11 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
12 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
13 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
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MCS T6, MCS T12, MCS T16 Explanation of symbols
1 Explanation of symbols
WARNING!
!
Safety instruction: Failure to observe this instruction can cause fatal or
serious injury.
CAUTION!
Safety instruction: Failure to observe this instruction can lead to injury.
!
NOTICE!
A
Failure to observe this instruction can cause material damage and impair
the function of the product.
NOTE
Supplementary information for operating the product.
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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 manufacturer
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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.
•
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.
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Target group for this manual MCS T6, MCS T12, MCS T16
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Installation and repairing of the air conditioner may only be carried out
by qualified personnel who are familiar with the risks involved 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.
4Proper 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 MCS T6, MCS T12 and MCS T16 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 is circulating through the system which is seawater cooled.
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MCS T6, MCS T12, MCS T16 Operating elements
6 Operating elements
6.1 Control Panel
Key to fig. 1, page 3:
Item Name Description
1 Power Button Press and release to toggle between the On and Off Modes.
2
3 Down Button Press and release to display the set point.
4 Faceplate sensor The faceplate sensor will read the room temperature unless a
5 Up Button Press and release to display the set point.
6 Display The inside air temperature is displayed when the control is on.
Fan Button
Press to advance through the available fan settings. “1”(lowest)
through “6” (highest) indicates Manual Fan Speeds.
The letter “a” indicates automatic fan operation selected.
Press and hold the Down Button to decrease the set point. Set
point is decreased 0.5 °C or 1 °F each time the button is
depressed.
remote air sensor is installed.
Press and hold the Up Button to increase the set point. Set
point is increased 0.5 °C or 1 °F each time the button is
depressed.
The set point is displayed when either Up or Down Button is
pressed.
The display also indicates program information and fault
codes.
7 LED “Heat
Mode”
8 LED “Fan
Indicator”
9 LED “Cool
Mode”
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.
This LED is lit when
– the Heat Only Mode is selected
– or the unit is in a heating cycle.
This LED is lit when a Manual Fan Speed is selected.
This LED is lit when
– the Cool Only Mode is selected
– or when the unit is in a cooling cycle.
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Operating MCS T6, MCS T12, MCS T16
6.2 Dual Button Functions
Up and Down Buttons
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While in the On Mode: Simultaneously press the Up and Down Buttons to display outside air temperature providing the optional outside air temperature sensor is installed.
•
While in the Program Mode: Simultaneously press the Up and Down Buttons
to set new program defaults.
Power and Down Buttons
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While viewing the service fault history log: Simultaneously press the Power
and Down Buttons to clear the fault history log (see “Service History Log” on
page 14).
•
While in the On Mode: Simultaneously press the Power and Down Buttons to
enter the Dehumidification Mode (see “Dehumidification Mode” on page 11).
7Operating
7.1 Initial startup
NOTICE!
A
➤ Ensure seawater intake ball valve (seacock) is open.
➤ Turn on air conditioner circuit breaker.
➤ If the seawater pump has its own circuit breaker, turn that on.
➤ Press the Fan Button (fig. 1 2, page 3).
✓ This energizes the fan.
➤ Verify that the fan is running and that there is steady airflow out of the supply-air
grille.
Do not turn the unit off and immediately turn it back on. Allow at least
30 s for refrigerant pressure equalization.
➤ Select a temperature set point lower than the current cabin temperature.
✓ This starts the compressor and seawater pump.
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MCS T6, MCS T12, MCS T16 Operating
➤ Check for a steady solid stream of seawater from the overboard discharge.
➤ If the unit does not appear to be operating properly, refer to troubleshooting
guidelines (“Troubleshooting” on page 24).
7.2 Overview
Power On
➤ Press the Power button (fig. 1 1, page 3) 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. 1 3 and 4, page 3) 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. 1 2, page 3) to select manual fan speeds.
You can program the fan 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.
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.
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Operating MCS T6, MCS T12, MCS T16
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 1.1 °C (2 °F) of set point, however
a 2.2 °C (4 °F) difference is required to allow the Marine Climate System to change
modes.
Once the mode changes temperature will be maintained within 1.1 °C (2 °F) of set
point.
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”.
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MCS T6, MCS T12, MCS T16 Operating
➤ 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.
Dehumidification 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 Dehumidification Mode.
✓ The “HU1” mnemonic code is displayed while in the Dehumidification Mode.
Program Mode
NOTE
The program mode can only be entered from the Off Mode.
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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.
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.
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Operating MCS T6, MCS T12, MCS T16
7.4 Operating the Marine Climate System
NOTICE!
A
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➤ Press the Power Button (fig. 1 1, page 3) shortly to engage the system.
✓ The display indicates room temperature when the system is on and is blank when
the system is off.
Do not turn the unit off and immediately turn it back on. Allow at least
30 s for refrigerant pressure equalization.
NOTE
When powering on the Marine Climate System, press and
immediately release the Power Button in order to not unintentionally
entering 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 Down Button (fig. 1 3, page 3) or Up Button (fig. 1 5, page 3) 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 indefinitely. When
power is restored, the Marine Climate System resumes operating as last programmed.
Automatic fan speed operation allows fan speed to decrease as room temperature 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.
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.
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MCS T6, MCS T12, MCS T16 Operating
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 program 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:
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Turn on in the Heat Mode and supply heating for 10 min.
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Stop heating and run the fan only for 5 min.
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Switch to Cool Mode and continue cooling for 10 min.
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Stop cooling and run the fan only for 5 min.
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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.
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Operating MCS T6, MCS T12, MCS T16
7.6 Service Tools
Hour Meter
Total compressor cycle time is saved in EEPROM every six minutes of continuous
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
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MCS T6, MCS T12, MCS T16 Programming
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 chro-
nology 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 But-
tons.
➤ To exit the service history log
– press either the Power, the Up or the Down Buttons or
– wait thirty seconds without pressing any button.
8Programming
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.
NOTE
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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.
The Marine Climate System will exit the Program Mode and return to the
Off Mode if no programming is attempted for one minute.
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Programming MCS T6, MCS T12, MCS T16
8.3 Saving New Program Parameters
NOTE
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➤ Simultaneously press the Up and Down Buttons to save the new program param-
eters.
✓ This will set the new program defaults.
Factory defaults shown in the “Programmable Parameters Table” on
page 17 may be reset manually (see “Restore Memorized Default Settings” on page 17).
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 second prior
to the exit from the Program Mode. The software identification number, e.g. (“A12”)
will appear in the display for one second, then the Marine Climate System will return
to the Off Mode.
NOTE
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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 number available. The
serial number may be found on the typeplate.
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MCS T6, MCS T12, MCS T16 Programming
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 System
returns to the Off Mode.
8.7 Programmable Parameters
Programmable Parameters Table
Program
number
P-1 Operating Mode 0 0 = Automatic mode
P-2 High Fan Speed Limit
P-3 Low Fan Speed Limit
P-4 Compressor Staging Time
P-5 Temperature Sensor
P-6 Failsafe 3 0 = Minimum protection
Description Default Range
1 = Cool only mode
2 = Heat only mode
95 65 – 95
(arbitrary units)
55 30 – 64
(arbitrary units)
15 5 – 135 s
Delay
Calibration
Ambient
Te m p e r a t u r e
Ambient 10 °F, –12,2 °C
1 = Continuous, no display
2 = Continuous, with display
3 = Four failures, reset required
P-7 Low AC Voltage Shut-
down (Volts)
P-8 De-Icing Cycle 1 OFF
115 V – OFF
220/230 V – OFF
75 – 105
175 – 205
1 = On with 5 °F, –15 °C faceplate
sensor differential
2 = On with 7°F, –13,9°C faceplate
sensor differential
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Programming MCS T6, MCS T12, MCS T16
Program
number
P-9 High Water Temperature
P-10 Display Brightness
P-11
P-12 Cycle Pump With
P-13 Reverse Fan Speeds Dur-
P-14 Continuous Fan or Cycle
P-15 Reverse Cycle Heating or
Description Default Range
Limit (°F)
Control
º
Display
Compressor or
Continuous Pump
ing Heating Mode
Fan with Compressor
Electric Heat Only Option
Installed (cooling only
units)
F or ºC
OFF 100 – 150
9 4 = Low
13 = Maximum
F F = Fahrenheit displayed
C = Celsius displayed
OFF OFF = Cycle with compressor
On = Continuous pump
rEF nor = Normal fan operation
rEF = Reversed fan in heating
con CYC = Cycle fan with compressor
con = Continuous fan operation
nor nor = Reverse cycle heating
ELE = Electric heater installed
P-16 Fan Motor type selection
Shaded Pole or Split
Capacitor.
P-17 Reset Memorized
Programming Defaults
P-18 Reserved for Future
Option
P-19 Reserved for Future
Option
P-20 Filter Threshold
(x10 hours)
P-21 Current Filter Time
(x10 hours)
P-22 Voltage Calibration (Volts) AC Voltage –
SC SP = Shaded pole fan motor
nor rSt = Reset defaults
––
––
00 00 – 250
x10 Hours Using
Current Filter
SC = Split capacitor fan motor
nor = Normal
–
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MCS T6, MCS T12, MCS T16 Programming
NOTE
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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
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.
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.
NOTE
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Once the high and low fan speed limits are set, the unit will automatically
readjust the remaining speeds to produce three equally spaced fan
speeds in both Automatic and Manual Fan Modes.
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Programming MCS T6, MCS T12, MCS T16
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 interrupted.
Units should be staged 5 s apart. The minimum delay is 5 s and the maximum is
135 s.
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 28).
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 immediately at
start up, but while running will require a 5 min delay before displaying 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 factors 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. 18.3 °C/65 °F) and leaving the 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.
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MCS T6, MCS T12, MCS T16 Programming
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 sensor. It attempts
to compensate for any temperature discrepancy that the faceplate 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 2.8 °C (5 °F) 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 3.9 °C (7 °F) 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 faceplate 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 displayed in
tenths, e.g. 22.2.
P-12: Cycle Pump With Compressor
The pump can also be programmed to operate continuously or cycle on demand.
➤ To program continuous operation select “On”.
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Programming MCS T6, MCS T12, MCS T16
P-13: Reverse Automatic Fan Speeds During Heating
The automatic fan speeds can be reversed during Heating Mode. The fan will speed
up as the set point is approached. Lowering the fan speed when the cabin is cold
increases head pressure and helps raise supply temperature. The fan switches to low
speed when the set point is satisfied and the compressor cycles off.
Normal fan operation is represented by “nor”.
➤ To reverse fan speeds in heating, select “rEF”.
P-14: Cycle Fan with Compressor
The fan can be programmed to run continuously when the system is on or can be
allowed to cycle with the compressor.
The default is “con”, continuous fan.
➤ To cycle the fan with the compressor select “CYC”.
NOTE
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P-15: Reverse Cycle or Electric Heat
➤ Do not change the default parameter.
P-16: Fan Motor Selection
I
The fan motor can also be programmed to operate with shaded pole (SP).
➤ To program operation with shaded pole fan motor select “SP”.
When used with optional electric heat the fan will remain on 4 min after
the heater cycles off.
NOTE
The unit’s High Velocity (HV) blower has a Split Capacitor (SC) fan
motor. The default is “SC” in order for the blower to work at peak
efficiency.
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MCS T6, MCS T12, MCS T16 Programming
P-17: Reset Memorized Defaults
The default programming parameters can be reset as follows:
➤ Select “rSt”.
✓ This restores the programmable parameters to the default values.
The default parameters listed in the “Programmable Parameters Table” on page 17
may be altered by the installing dealer or end user. Once new defaults are entered
and memorized the factory defaults will be overwritten. The original factory program
parameters as listed in the table may be restored manually.
P-18, P-19: Reserved for Future Option
P-20: Filter Threshold
This feature is to remind you to change the air filter on a unit. The units are x10 hours.
By default it is off, which is designated with a “00”, but it can be set between 100 and
2500 hours. After the unit has reached its threshold time, it will display a “FIL” remind
1 s every 10 s.
P-21: Current Filter Time
This feature is used to display the amount of time the current filter has been on the
unit. The units are x10 hours.
➤ In order to reset this parameter, simply press the Up or Down Button.
P-22: Voltage Calibration
This feature displays the voltage reading as seen by the display. Calibrating this
parameter will provide a more accurate voltage when calculating low voltage for P-7.
It will display a live reading of the voltage.
➤ Manipulate the reading by pressing the Up or Down Button.
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Troubleshooting MCS T6, MCS T12, MCS T16
9 Troubleshooting
9.1 General Troubleshooting
Problem Possible Reason Solution
System will not start. Air conditioning unit circuit breaker is
off.
Control is not turned on. Turn control on.
Wrong wiring at terminal strip. Check wiring diagram and correct if
Push-on butt connectors became
disconnected during installation.
Input line voltage is insufficient. Check power source (shore/genera-
Fan is not running. – See corresponding section in “Con-
Turn circuit breaker on at ship’s
panel.
necessary.
Disconnect power supply and open
electric box.
Check wiring diagram, correct if necessary.
tor) for proper voltage.
Check wiring and terminals for
proper sizes and connections.
Verify with a volt-meter that the
power at the unit is the same as the
power source.
trol Panel Troubleshooting” on
page 30.
24
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MCS T6, MCS T12, MCS T16 Troubleshooting
Problem Possible Reason Solution
No cooling or heating. Temperature set point is satisfied. Lower or raise set point.
Obstructed seawater flow. Clean seawater strainer.
Check for obstructions at speed
scoop thru-hull inlet.
Check for a good steady flow from
the overboard discharge.
Seawater pump may be air-locked. Remove hose from pump discharge
to purge air from line.
Loss refrigerant gas. Check air conditioning unit for refrig-
erant oil leakage.
Call service technician.
Seawater temperature too high for
cooling or too low for heating.
Seawater temperature will directly
affect air conditioning unit’s efficiency.
This air conditioning unit can effectively cool your boat in water temperature up to 32.2 °C (90 °F) and heat
in water temperatures as low as
4.4°C (40°F).
25
EN
Troubleshooting MCS T6, MCS T12, MCS T16
Problem Possible Reason Solution
No cooling or heating
(contn’d).
Fan coil is iced (in cooling). See below.
Fan is not running. See corresponding section in “Con-
trol Panel Troubleshooting” on
page 30.
Seawater plumbing is air-locked. Ensure that seawater plumbing is
installed per the guidelines in the
Installation Manual.
The Marine Climate System is programmed for Cool or Heat only, or
mechanical control thermostat is
rotated too far towards either Cooler
or Warmer setting.
High pressure switch open (in cooling) due to improper seawater flow.
Strainer or intake may be plugged,
seacock may be closed.
High pressure switch open (in heating) due to improper airflow.
Set P-1 to the desired value or rotate
the mechanical control thermostat.
Check seawater hose for kinks or collapses.
Verify pump operation.
Check pump circuit breaker if appli-
cable.
Remove any obstructions in return air
stream.
Clean return air filter and grille.
Check for crushed or restricted duct-
ing (ducting must be as straight,
smooth and taut as possible).
High-pressure switch is open in heating mode.
Compressor’s thermal overload is
open due to either of the above reasons.
No cooling Control panel may not be in “cool”
position.
Coil iced. See below.
No heating. Unit is “cool only”, or if reverse cycle,
reversing valve may be stuck.
System may cycle on high-pressure if
seawater temperature is above
12.8 °C (55 °F).
Compressor needs to cool down.
Turn system off for a while (it may take
up to three hours to reset thermal
overload).
Reset control panel.
Tap reversing valve lightly with rubber mallet while unit is in heat mode.
Call for service if that does not correct the problem.
26
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MCS T6, MCS T12, MCS T16 Troubleshooting
Problem Possible Reason Solution
Low airflow. Airflow is blocked. Remove any obstructions in return air
stream.
Clean return air filter and grille.
Check for crushed or restricted duct-
ing, ducting must be as straight,
smooth and taut as possible.
Fan Coil is iced. See below.
Fan coil is iced. Thermostat set point is too low. Check setting on control panel.
If setting is extreme for conditions,
raise set point until unit cycles off to
give coil time to thaw.
Improper airflow. Remove any obstructions in return air
stream.
Clean return air filter and grille.
Check for crushed or restricted duct-
ing.
Ducting run must be as straight as
possible; remove any excess ducting.
See the “Control Panel Troubleshooting” on page 30 for reprogramming options.
Water coil is iced in the
Heating Mode.
System runs
continuously.
Supply air is short-cycling. Redirect supply air so that is not
blowing into the return air stream.
Seal any air leaks on duct.
Humidity level too high. Close hatches and doors.
When all else fails. Switch air conditioning unit to heat
until ice melts or use hair dryer to
melt.
Seawater temperature is below
4.4 °C (40 °F).
Set point temperature is improperly
set: too low for cooling or too high
for heating.
Porthole or hatches open. Close all port holes and hatches.
Shut down system to prevent damage to condenser.
Allow coil to defrost.
Raise or lower set point.
27
EN
Troubleshooting MCS T6, MCS T12, MCS T16
Problem Possible Reason Solution
System runs
continuously (contn’d).
Short cycling
compressor
Seawater temperature too high for
cooling or to low for heating.
Improper air sensor location. See corresponding section in “Con-
Cold supply air returning directly to
return air grille.
Seawater temperature will directly
affect the air conditioning unit’s efficiency.
This air conditioning unit can effectively cool your boat in water temperatures as low as 4.4°C (40°F) and
heat (if reverse cycle option is
installed) in water up to 32.2 °C
(90 °F).
trol Panel Troubleshooting” on
page 30.
Redirect supply air so that it is not
directed into the return air stream.
9.2 Failsafe and Fault Handling Codes
When a fault is detected the Marine Climate System will display one of the following
Mnemonic fault codes:
•
“ASF”: Indicates Air Sensor Fault.
•
“FIL”: Indicates filter needs replacing (if this option is enabled).
•
“HPF”: Indicates High refrigerant pressure.
•
“LAC”: Indicates Low AC voltage (if this option is enabled).
•
“PLF”: Indicates high water temperature in condensing coil (if this option is enabled).
NOTE
“HPF” is not indicated and does not cause lockout in Heat Mode.
I
Failsafe Level 0
Only “ASF” detected and displayed.
The Marine Climate System will shut down and will not restart until the fault is
repaired.
Once the fault is repaired the Marine Climate System will restart.
28
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MCS T6, MCS T12, MCS T16 Troubleshooting
Failsafe Level 1
All actions in level 0 plus all other faults detected but not indicated.
The system shuts down for 2 min or until the fault is cleared, whatever is longer.
The system will restart if the fault is cleared.
Failsafe Level 2
All actions same as level 0 and 1. Faults are indicated.
The system shuts down for 2 min or until the fault is cleared, whatever is longer.
Failsafe Level 3
All actions the same as level 0, 1 and 2.
The system shuts down for 2 min or until the fault is cleared, whatever is longer.
The system will lockout after four consecutive “HPF” or “LPF” faults.
To clear the lockout:
➤ Pressing the Power Button once to Off Mode.
➤ Pressing the Power Button again to On Mode.
29
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Troubleshooting MCS T6, MCS T12, MCS T16
9.3 Control Panel Troubleshooting
Problem Possible Reason Solution
Control panel is not lit. 8-pin display cable plugs are not
making contact (unplugged, dirty,
bent, or broken pins).
Fan is not running or
runs continuously.
Fan is not running but
the compressor is.
Fan runs continuously
although it is set to cycle
with compressor.
No cooling or heating. The Marine Climate System is pro-
The Marine Climate System is programmed for either fan cycling with
compressor or continuous fan operation.
Failed triac on control panel circuit
board.
Failed triac on control panel circuit
board.
grammed for heat or cool only.
“HPF” or “LPF” is displayed. See below.
Power off at the circuit breaker.
Remove connector and inspect.
If damaged, replace connector or
entire display cable.
Reprogram parameter P-14.
Note: After the compressor cycles
off, the fan will continue to run for
2 min in Cool Only Mode and 4 min
in Heat Only Mode regardless of
parameter setting.
Send for repair or call local service
technician.
Send for repair or call local service
technician.
Reprogram parameter P-1.
No heat. The Marine Climate System may be
set to Electric Heat, not Reverse
Cycle.
Unit switches to heat
while in Cool Mode.
Fan coil is iced. Improper airflow. See corresponding section in “Gen-
De-icing feature enabled due to coil
icing up.
Reprogram parameter P-15.
Reprogram parameter P-8
eral Troubleshooting” on page 24,
before reprogramming the Marine
Climate System.
Reprogram parameter P-8 to enable
de-icing.
If de-icing cycle does not melt ice,
switch air conditioning unit to heat
until ice melts or use hair dryer to
melt ice.
If problem persists, reprogram Low
Fan Speed Limit for maximum value:
Set P-3 to 64.
30
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