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DRAKE MCS-MicroMag Error / Alarm Manual

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MCS – MicroMag
Error / Alarm
Manual
www.drakechillers.com
2900 Samuel Drive | Bensalem, PA 19020
(888) 289-7299 | (215) 638-5515

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Summary of Contents for DRAKE MCS-MicroMag

  • Page 1 MCS – MicroMag Error / Alarm Manual www.drakechillers.com 2900 Samuel Drive | Bensalem, PA 19020 (888) 289-7299 | (215) 638-5515...
  • Page 2 This page intentionally left blank...

  • Page 3: Table Of Contents

    Version: 02/21/2020 MCS – MicroMag Error / Alarm Manual Table of Contents General Troubleshooting ................. 1 Microprocessor Features ................. 2 Display Features ..................3 Unit States ....................4 PowerUpDelay ..................4 OFF SCHEDULE ..................4 OFF RUN/STOP ..................5 COOLING ....................5 MACH LOCKOUT ..................

  • Page 4: General Troubleshooting

    Version: 02/21/2020 MCS – MicroMag Error / Alarm Manual General Troubleshooting 1. Before calling Drake, make sure you: a. Have ready: i. Chiller’s serial number (located on the exterior of the chiller, inside the electrical panel door, and, on the sticker shown to the right) ii.

  • Page 5: Microprocessor Features

    Version: 02/21/2020 MCS – MicroMag Error / Alarm Manual Microprocessor Features 6 Relay Outputs 2A 250V (OUTPUTS - RO) Mini Fuse 24 VAC Input (optional 12VDC) 5 A 250V Mini Fuse 4 Analog Outputs (OUTPUTS – AO) RS485 Serial Communication 12 VDC Output 10 Sensor Inputs Standard Features...

  • Page 6: Display Features

    Version: 02/21/2020 MCS – MicroMag Error / Alarm Manual Display Features LCD Backlit Display 6 Button Menu Keypad Standard Features • LED-backlit display with a 6-button navigation menu o Displays current unit status and lockout alarms o Displays full range of sensor inputs, relay outputs, and setpoints o Suction / discharge pressure and superheat monitoring o Monitors compressor runtime and cycles per day •...

  • Page 7: Unit States

    Version: 02/21/2020 MCS – MicroMag Error / Alarm Manual MicroMag Unit States PowerUpDelay A 60-second delay during chiller startup in which all Relay Outputs are shut off and ensures the board is receiving stable power. OFF SCHEDULE When the unit is shut off due to a user set schedule, the unit displays this status.

  • Page 8: Off Run/Stop

    Version: 02/21/2020 MCS – MicroMag Error / Alarm Manual MicroMag Unit States OFF RUN/STOP This status is displayed when the Run/Stop Switch has been turned off. In this state, all relays are disabled, and their statuses will read “OFF.” To enable the Run/Stop, refer to Appendix D. COOLING When the fluid inlet or outlet temperature sensor reads a value higher than the value of Setpoint #8...

  • Page 9: Mach Lockout

    Note - If the Lockout Reset is used more than 6 times in one day, the unit cannot be reset except with Factory authorization. Call Drake for support. PUMP ONLY This state is entered when all compressors have...

  • Page 10: Alarms

    Version: 02/21/2020 MCS – MicroMag Error / Alarm Manual MicroMag Alarms Supply Freeze This alarm will trip if the fluid out temperature drops below the value of Setpoint #86. The chiller will lockout and all Relay Outputs will be disabled to avoid damage to the chiller.

  • Page 11: Low Suction Superheat

    Verify superheat reading with physical gauges Adjust the TXV (shown to the right) Replace if needed Refrigerant Overcharge Contact Drake P a g e Phone: (888) 289-7299 Email: drakeservice@drakechillers.com...

  • Page 12: High Discharge Pressure

    (right picture) Restriction in cooling Confirm that all valves are opened water (Water-cooled) Adjust regulator (shown to the right) Refrigerant Overcharge Contact Drake P a g e Phone: (888) 289-7299 Email: drakeservice@drakechillers.com...

  • Page 13: Low Discharge Pressure

    Adjust the ORI valve (shown to the right) for a controls (Receivers higher receiver pressure setting only) Check for refrigerant leak Refrigerant charge is Contact Drake to determine the charge 10 | P a g e Phone: (888) 289-7299 Email: drakeservice@drakechillers.com...

  • Page 14: Low / Unsafe Suction Pressure

    Ensure heat load is present Setpoint #62 is incorrect Check with Drake, then change setpoint to a lower value for operating conditions Shut down system, fully backseat TXV (shown to the right), then front-seat TXV. Set TXV back Defective TXV valve to the operating position.

  • Page 15: No Flow

    Version: 02/21/2020 MCS – MicroMag Error / Alarm Manual MicroMag Alarms No Flow This alarm will trip if the Flow Switch on the evaporator detects no flow for the allotted amount of time (Setpoint 120). With this alarm tripped, the compressors will each shut down until flow is reestablished.

  • Page 16: Phase Loss

    Ensure MicroMag is outputting 5VDC from the sensor terminal Problem with 5VDC MicroMag output If MicroMag is not outputting 5VDC, call Drake for assistance See Appendix C to troubleshoot Fault on Phase Monitor (Phase monitor is shown to the right)

  • Page 17: No Battery

    Version: 02/21/2020 MCS – MicroMag Error / Alarm Manual MicroMag Alarms No Battery This alarm will trip if the internal battery has run dry or if it has been removed. Note: Supervisor password (2112) is required to reset lockouts Possible Causes Solutions Reinstall or replace the battery (location shown to...

  • Page 18: Sensor Fault

    Version: 02/21/2020 MCS – MicroMag Error / Alarm Manual MicroMag Alarms Sensor Fault This alarm will occur whenever a sensor input is not receiving any feedback from its sensor. If a sensor or wire is disconnected from the MicroMag, the input will read -99.9 and if a sensor is shorted, it will read 999.9.

  • Page 19: Appendices

    Version: 02/21/2020 MCS – MicroMag Error / Alarm Manual Appendix A Cooling States • COOL INIT - Cooling is in initialization mode • UNLOADING AZ - We are above the zone and unloading (ROC) • LOADING AZ - We are above the zone and loading (normal) •...

  • Page 20: Appendix B: Diagnosing Sensor Errors

    6. Verify that pressure sensor is completely screwed into Schrader valve on the pipe 6, 7 7. Check to make sure Schrader valve is depressing Call Drake for assistance 17 | P a g e Phone: (888) 289-7299 Email: drakeservice@drakechillers.com...
  • Page 21 (see Sensor Wiring section on page 19) Temperature Sensor 4. Check the sensor cable for any signs of damage Call Drake for assistance 18 | P a g e Phone: (888) 289-7299 Email: drakeservice@drakechillers.com...
  • Page 22 Version: 02/21/2020 MCS – MicroMag Error / Alarm Manual Appendix B Sensor Locations Flow Switch Suction Temperature Sensor Suction Pressure Transducer Discharge Pressure Transducer 19 | P a g e Phone: (888) 289-7299 Email: drakeservice@drakechillers.com...
  • Page 23 Version: 02/21/2020 MCS – MicroMag Error / Alarm Manual Appendix B Sensor Wiring Shielding Wire Temperature Sensor Pressure Transducer Wiring Diagram Wiring Diagram Flow Switch Wiring Diagram Silver Shielding Wire Example Sensor Wiring (Pressure Transducer) 20 | P a g e Phone: (888) 289-7299 Email: drakeservice@drakechillers.com...

  • Page 24: Appendix C: Phase Monitor Faults

    Version: 02/21/2020 MCS – MicroMag Error / Alarm Manual Appendix C Phase Monitor Faults Fault Solutions 1. Re-energize the contactor 2. If the fault reappears after the load energizes: Back Phase Loss a. Turn all power OFF Missing phase on the load side b.
  • Page 25 Version: 02/21/2020 MCS – MicroMag Error / Alarm Manual Appendix C 1. Turn OFF all power Front Phase Reversal 2. Swap any 2 phases on the line side of the Line phases not shifted by 120° phase monitor 3. Re-apply power 1.

  • Page 26: Appendix D: Enter Password And Enable Run / Stop

    Version: 02/21/2020 MCS – MicroMag Error / Alarm Manual Appendix D Enter Password 1. Press the MENU button on the keypad. The “Main Menu” will appear 2. Press the UP button until the “Enter Password” menu appears 3. Press ENTER, then enter the supervisor password (2112).
  • Page 27 Version: 02/21/2020 MCS – MicroMag Error / Alarm Manual Appendix D Enable Run/Stop 5. After entering the supervisor password (steps on page 23), press the DOWN button until the “Inputs – SI” menu appears 6. Press ENTER, and then press the UP button until Run/Stop appears on the screen (usually M-9) 7.

  • Page 28: Appendix E: Change Date / Time

    Version: 02/21/2020 MCS – MicroMag Error / Alarm Manual Appendix E Change Date / Time 1. Press the MENU button on the keypad. The “Main Menu” will appear 2. Press the DOWN button until the “Service Tools” menu appears, then press ENTER 3.
  • Page 29 Version: 02/21/2020 MCS – MicroMag Error / Alarm Manual Appendix E 5. To change the date or time, press the ENTER button again. This will allow you to edit the current values. Press the UP and DOWN buttons to change the value and LEFT and RIGHT to choose what you are changing 6.

  • Page 30: Troubleshooting Notes

    Version: 02/21/2020 MCS – MicroMag Error / Alarm Manual Troubleshooting Notes _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ 27 | P a g e Phone: (888) 289-7299 Email: drakeservice@drakechillers.com...
  • Page 31 Version: 02/21/2020 MCS – MicroMag Error / Alarm Manual Notes _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ 28 | P a g e Phone: (888) 289-7299...
  • Page 32 Drake Refrigeration, Inc. 2900 Samuel Drive • Bensalem, PA 19020 (888) 289-7299 Phone: (215) 638-5515 Fax: (215) 638-5518...

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