Marine Air Systems ECU-Maxx Operation Manual Download Page 24 | Manualshive

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PAGE 24

ECU-Maxx VER:10a 12/1/97

ECU-M

AXX

O

PERATIONS

M

ANUAL

ECU-M

AXX

I

NPUTS

AND

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UTPUTS

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Summary of Contents for ECU-Maxx

Page 1: ......

Page 2: ... SAFE AND FAULT HANDLING 25 FAULT HANDLING FAIL SAFE MODES 26 416 OPTION BOARD 27 TYPICAL APPLICATION 28 SPECIFICATIONS 29 FACTORY PROGRAMMING OPTIONS F 1 THROUGH F 8 30 REVISION HISTORY 31 Copyright 1995 Micro Air Corporation All Rights Reserved No part of this publication may be reproduced translated stored in a retrieval system or transmitted on any form or by means electronic mechanical photoc...

Page 3: ...reased current draw can mean a loss ofcoolingwater compressororelectricalproblems Thesystemamperageisthe second item accessed in View Mode Dual Voltage Capability Line voltage is recognized on power up by the ECU Maxx and the unit automatically adapts to the voltage applied This feature eliminates the need to stock two separate voltage controls WARNING Dual voltage only applies to the control unit...

Page 4: ... conditions Power Failure Recovery The ECU Maxx features automatic shutdown and restart during brown out conditions The system is programmed to shut down after 5 five minutes of continuous low line voltage The unit will automatically restart when the line voltage returns to normal Compressor Soft Start The ECU Maxx may be configured with an optional Compressor Soft Start feature The compressor sof...

Page 5: ...Maxx between Off Mode and On Mode enter Program Mode and reset the Factory Default Values for the programmable parameters 2 FAN SPEED button The fan speed button is used to switch between the automatic and manual fan features and is also used to select the fan speed when in Manual Fan Mode 3 UP button TheUpbuttonisusedtoincreasethetemperaturesetpointvalue andtoincrease the value of programmable pa...

Page 6: ... the fault detected by the ECU Maxx The decimal point to the far right on this display is used to indicate when the compressor is on 8 HEAT MODE light The heat mode indicator LED will be lit when Heat Mode has been selected 9 COOL MODE light The cool mode indicator LED will be lit when Cool Mode has been selected 10 AUTOMATIC MODE light The automatic mode indicator LED will be lit when Auto Mode h...

Page 7: ...Mode When the ECU Maxx is in the Off Mode all control outputs will be turned off All programmed parametersandusersettingswillbesavedinnonvolatilememory ProgramModecanonlybeaccessed in the OFF Mode On Mode When the ECU Maxx is in the On Mode power will be supplied to the appropriate control outputs and the displays will indicate the current state of operation This was the state stored the last time...

Page 8: ...balance between the most efficient temperature control and slower quieter fan speeds Manual Fan Mode Manual fan mode allows the customer to set the fan speed manually View Mode ViewModeisoneoftheServiceModes Viewmodeallowstheusertoexamine system voltage current inlet water temperature total compressor run time HI and LO Pressure Switch status and the AC line Hz Program Mode Program Mode is one of ...

Page 9: ...oom temperature as the ECU Maxx will maintain temperature to within two degrees of the set point The maximum setting for the set point is 85º F The minimum setting for the set point is 60º F To change the Set Point Pressing the Up or Down buttons when the ECU Maxx is in the On Mode forces the display to show the set point the Set Point indicator LED will be lit and will raise or lower the set poin...

Page 10: ...he Fan Speed button when one of these fan speed lights are on will set the fan speed to that number Example Releasing the button when the third LED is on will set a Manual fan speed of 3 or medium Note Selecting 1 through 6 results in a manual fan speed setting and lights the manual lamp The fan speed will not vary from this setting but will be corrected for low line voltage Setting Fan Only Mode ...

Page 11: ...elated to program parameters can also cause what seem to be operational problems WheneverthereisanydoubtastotheproperoperationoftheECU Maxxcontrol unit factory default parameters should be initialized Entering Program Mode Program Mode can only be entered from OFF Mode From Off Mode press and hold the Power button for 5 five seconds until a P appears in the display Release the Power button and the...

Page 12: ...tification The software version is identified for 1 one second prior to the exit from ProgramMode Thesoftwarenumberwillappearinthedisplayforonesecond then the display turns off PROGRAMMABLE PARAMETERS The 34 programmable parameters along with their Factory Default Settings are listed in at the end of this section The following are definitions and operating theory for all the programmable functions...

Page 13: ...ompressor The pump output can be configured in one of two ways Off selects continuous operation of the pump when the ECU Maxx is on On selects the function to allow the pump to cycle with the compressor This setting reduces pump wear by cycling the pump with the heating or cooling demandonly factorydefaultsetting Inthismodethepumpwillcontinuetorun for 2 minutes after the compressor cycles off P 5 ...

Page 14: ...peeds are directly related to temperature reduction in cooling and temperature increases in heating There are two options available 1º spread per fan speed or 2º spread per fan speed In cooling the fan speeds increase as the temperature exceeds the set point In heating the fan speed increases as the temperature decreases in relation to the set point In both cases the fan speed increases as the tem...

Page 15: ...ated by alternately flashing L O then H2O in the display Fail safe protection levels apply to the low water limit IftheoptionalCALrodheaterisinstalled theECU Maxxwillautomaticallyswitch to the CAL rod heater when the water temperature is below the limit The LO H2O warning will not be displayed when the CAL rod heateris installed The range for the low water limit setting is 40º F through 60º F 50 F...

Page 16: ...t Delay The compressor start delay is included for use in installations where more than one system is being operated from the same power source The start delay can besetatdifferentintervalsforeachcontroltoallowonlyonecompressortostart at a time The units should be staged at least 5 seconds apart The minimum delay is 5 seconds The maximum delay is 135 seconds Use the Up and Down buttons to set the ...

Page 17: ...t the control from oscillating between heating and cooling while in Auto Mode The ECU Maxx can be configured to provide 2º 3 4º 5 or 6º of hysteresis P26 System Current Limit The ECU Maxx limits the current supplied to the components attached to it This parameter sets the maximum current available to the power outputs The valid range of values is 5 to 40 Amperes The factory default is 35 Amperes I...

Page 18: ...air sensor is tested and the temperature displayed If the sensor is defective AIR will flash continuously in the display A good sensor will display the correct ambient temperature 3 Lamp Test All LEDs are turned in for 3 seconds and then turned off 4 Alternate Air Sensor Test If installed the alternate air sensor is tested in the same manner as the face plate sensor 5 Water Inlet Sensor Test The w...

Page 19: ...sing valves An optional electric heater CAL Rod Heater must be installed if heating is required P 33 De Icing This option is designed to periodically deice the evaporator coil when low fan speed has been selected A two minute De Icing Cycle is performed each hour the thermostat does not detect reduction in cabin temperature Once the first cycle is initiated low fan speed is increased by one number...

Page 20: ...5 to 15 5 C P 15 W ater S ensor O ption O ption Board Required O ff O n O ff P 16 H igh Pressure S witch O ption C ompessor must be running O n O n O ff P 17 Low Pressure S witch O ption C ompessor must be running O n O n O ff P 18 H igh P ressure F reon S witch Disable H eating M ode O nly O n O n O ff P 19 Low P ressure F reon S w Hold O ff D elay 10 min 1 to 15 M inutes P 20 C al Rod H eater O ...

Page 21: ...and running and will remain running until temperature requirements are met The system shuts down by first turning off the compres sor The Reversing Valve remains energized until the next cycle if the system was in heating Two minutes after the compressor turns off the Pump turns off and the Fan is set to Low Speed Soft Start Timing The soft start feature has been developed to reduce the starting l...

Page 22: ...PAGE 22 ECU Maxx VER 10a 12 1 97 ECU MAXX OPERATIONS MANUAL SYSTEM TIMING DIAGRAM ...

Page 23: ...he system is on and the fan is operating 2 On when the compressor isON and OFF when the compressor is OFF This setting reduces pump wear The pump will cycle off 2 minutes after the compressor in this mode Thevalveoutputisturnedonwhenthecontrolsensestheneedforheating The water temperature must be greater than the low water limit to activate the valve if the optional CAL rod heater has been installe...

Page 24: ...PAGE 24 ECU Maxx VER 10a 12 1 97 ECU MAXX OPERATIONS MANUAL ECU MAXX INPUTS AND OUTPUTS ...

Page 25: ...Fault Shutdown ON L O A C Unit will continue to operate System shutdown will occur after 5 MINUTES of continuous low voltage Requires a manual restart after 4 consecutive failures YES YE Electrical Shorts on Power Output LInes install problems SHO All electrical outputs are turned off Fault code indicates which output is shorted PU Pump rE Reversing Valve FA Fan CO Compressor Requires Power Remova...

Page 26: ...rical Short Faults When a short is detected on one of the system output terminals the ECU Maxx will display the fault code SHO followed by another code indicating which output is shorted CO indicates a Compressor short FA indicates a Fan short PU indicates a Pump short rE indicates a Valve short Failsafe Protection Level Action Description of Action Taken by ECU Maxx 1 Display fault only M IN IM U...

Page 27: ...X OPERATIONS MANUAL 416 OPTION BOARD An Optional Accessory Board may be ordered for the ECU Maxx Part Number 416 X0A This board provides inputs for the following features Auxiliary Heater CAL Rod Heater Outside Air Sensor Service Water Sensor ...

Page 28: ...PAGE 28 ECU Maxx VER 10a 12 1 97 ECU MAXX OPERATIONS MANUAL TYPICAL APPLICATION ...

Page 29: ...0 F LOW VOLTAGE DETECTION Programm able 115 VOLT UNITS 85 VAC 220 VOLT UNITS 185 VAC SENSOR ACCURACY 2 F at 77 F FUSING ELECTRONIC VOLTAGE 110 or 220 VAC at 50 or 60 Hz FAN OUTPUT 25 AMPS at 220 VAC VALVE 25 AMPS at 220 VAC PUMP 25 AMPS at 220 VAC COMPRESSOR 40 AMPS at 220 VAC CAL ROD HEATER 416 Option Board Required 30 AMPS at 220 VAC ...

Page 30: ...isplay window F 5 Short Circuit Test The short circuit test is normally Off however while the unit is being installed the short circuit test can be turned On Once the system is installed and no short circuits are detected the Short Circuit Test should be turned Off Turning off the test will speed the cold boot up time from the AC power off condition F 7 Reserved For Future Use F 7 is a blank memor...

Page 31: ...rt circuit test in 220 volt mode to reduce false messages on 220 applications Update and correct Factory Default Table on page 20 Miscel laneoustyping grammarandspellingcorrections UpdatemastercopyforRussell smanualfile Revision 10a Changes for Version 45 including dropping Bimini Relay and integrating all daughter boards onto the motherboard Software and hardware changed to incorporate all known ...

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