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Summary of Contents for DRAKE MCS-Magnum
- Page 1 MCS – Magnum Error / Alarm Manual www.drakechillers.com 2900 Samuel Drive | Bensalem, PA 19020 (888) 289-7299 | (215) 638-5515...
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Page 3: Table Of Contents
Version: 1.0 MCS – Magnum Error / Alarm Manual Table of Contents General Troubleshooting ....................1 Microprocessor Features ..................... 2 Display Features......................3 Unit States ........................4 Unit in Power Up ......................4 Scheduled Off ......................4 Run / Stop Switch Off ....................5 Off - No Flow ........................ - Page 4 Version: 1.0 MCS – Magnum Error / Alarm Manual Oil Float ........................25 Sensor Fault ....................... 26 Appendices ........................26 Appendix A: Magnum Board Troubleshooting ............26 Appendix B: Diagnosing Sensor Errors ..............30 Appendix C: Phase Monitor Faults ................36 Appendix D: Enter Password ..................
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Page 5: General Troubleshooting
Version: 1.0 MCS – Magnum 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 6: Microprocessor Features
• Scheduled shutdown capabilities • Integrates with MCS-Connect, a simple, free to use chiller monitoring computer software • Custom programmable control logic (call Drake for more information) • Remote control capabilities • Expansion boards for additional inputs and outputs •... -
Page 7: Display Features
Version: 1.0 MCS – Magnum Error / Alarm Manual Display Features LCD Backlit Display 9 Button Menu Keypad ENTER Button Standard Features • LED-backlit display with a 9-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 8: Unit States
Version: 1.0 MCS – Magnum Error / Alarm Manual Magnum Unit States Unit in Power Up A 60-second delay (configurable) during chiller startup in which all Relay Outputs are shut off and ensures the board is receiving stable power. Scheduled Off When the unit is shut off due to a user set schedule, the unit displays this status. -
Page 9: Run/Stop Switch Off
Version: 1.0 MCS – Magnum Error / Alarm Manual Magnum Unit States Run/Stop Switch 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 E. Off –... -
Page 10: No Run - I/O Lost
Version: 1.0 MCS – Magnum Error / Alarm Manual Magnum Unit States No Run – I/O Lost This state is displayed when the connection with an expansion board (whether a relay or sensor expansion board) has been lost. The board will keep trying to reconnect and will display a LOST I/O RESTART if it reconnects to board. -
Page 11: Unit Unloading
Version: 1.0 MCS – Magnum Error / Alarm Manual Magnum Unit States Unit Unloading This state is displayed when the unit needs fewer cooling levels. The system will then start to decrease in capacity by turning off compressors or, if applicable, turning on compressor unloader valves. -
Page 12: Unit Is Unloaded
Version: 1.0 MCS – Magnum Error / Alarm Manual Magnum Unit States Unit is Unloaded This state is displayed when all possible levels of cooling have been disabled, and thus the unit is no longer running. All compressors will be shut off in this state. -
Page 13: Unit In 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. P a g e Phone: (888) 289-7299... -
Page 14: Alarms
Version: 1.0 MCS – Magnum Error / Alarm Manual Magnum Alarms Freeze This alarm will trip if the fluid out temperature drops below the value of Setpoint #111. The chiller will lockout and all Relay Outputs will be disabled to avoid damage to the chiller. -
Page 15: Low Suction Superheat
Verify superheat reading with physical gauges Adjust the TXV (shown to the right) Replace if not responding to adjustments Refrigerant Overcharge Contact Drake 11 | P a g e Phone: (888) 289-7299 Email: drakeservice@drakechillers.com... -
Page 16: 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 12 | P a g e Phone: (888) 289-7299 Email: drakeservice@drakechillers.com... -
Page 17: 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 13 | P a g e Phone: (888) 289-7299 Email: drakeservice@drakechillers.com... -
Page 18: Low / Unsafe Suction Pressure
Ensure heat load is present Setpoint #77 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 to Defective TXV valve the operating position. -
Page 19: No Flow
Version: 1.0 MCS – Magnum Error / Alarm Manual Magnum Alarms No Flow This alarm will trip if the Flow Switch on the evaporator detects no flow. With this alarm tripped, the compressors will shut down and stay off until flow is reestablished. -
Page 20: Phase Loss
Ensure Magnum is outputting 5VDC from the sensor terminal Problem with 5VDC Magnum output If Magnum 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 21: Emergency Stop
Version: 1.0 MCS – Magnum Error / Alarm Manual Magnum Alarms Emergency Stop This alarm will display when the Emergency Stop Switch has been turned on. All relays, other than the alarm, will be shut off and the unit will be locked Note: Supervisor password (2112) is required to reset lockouts Possible Causes... -
Page 22: Low Discharge Superheat
Change the time in the Setpoint to allow the compressor more time properly adjusted to raise the discharge superheat Liquid refrigerant Take a manual superheat reading and verify sensor accuracy entering compressor Liquid injection not Call Drake functioning properly 18 | P a g e Phone: (888) 289-7299 Email: drakeservice@drakechillers.com... -
Page 23: High Discharge Temperature
Unit running unloaded for an extended period High Ambient (for most chillers, above 95°F) Moisture present in Check sight glass for moisture. If present, call Drake system Fill oil to compressor manufacturer’s specifications Lack of oil / bad oil quality... -
Page 24: High Motor Temperature / Motor Fault
Adjust Setpoints #1 - #3 to cycle the compressor off due to lack of load Moisture present in Check sight glass for moisture. If present, call Drake system Fault from compressor Check fault code motor module... -
Page 25: High Motor Amperage
Possible Causes Solutions Sensor Fault / See Appendix B to troubleshoot Calibration Moisture in system Check sight glass for moisture. If present, call Drake Liquid refrigerant in compressor during The crankcase has failed. Replace the compressor crankcase startup System overcharged... -
Page 26: Low Motor Amperage
(right picture) Compressor not running when called Ensure Magnum relay output is working correctly (see Appendix A: Relay Output Errors) Verify all wiring is correct Low refrigerant charge Call Drake 22 | P a g e Phone: (888) 289-7299 Email: drakeservice@drakechillers.com... -
Page 27: No Compressor Proof
Version: 1.0 MCS – Magnum Error / Alarm Manual Magnum Alarms Dirty Oil Filter and Low / Unsafe Oil Differential DIRTY FILTER will display when the difference between the discharge pressure and the oil Note: Supervisor password (2112) is pressure is above the value of Setpoint #97 for an required to reset lockouts adjustable time (found in the Setpoint). -
Page 28: Dirty Filter And Low / Unsafe Oil Differential
Version: 1.0 MCS – Magnum Error / Alarm Manual Magnum Alarms Oil Float This alarm displays when the digital input for oil float is ON for an adjustable time (found in Setpoint #139). Note: Supervisor password (2112) is required to reset lockouts Possible Causes Solutions Sensor Fault /... -
Page 29: Sensor Fault
Version: 1.0 MCS – Magnum Error / Alarm Manual Magnum 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 Magnum, the input will read -99.9 and if a sensor is shorted, it will read 999.9. -
Page 30: Appendices
10 seconds and then plug it back in c. If still unresolved, call Drake 5. Make sure LCD backlight on the keypad is lit up. If not, call Drake Call Drake for assistance 26 | P a g e... - Page 31 Set relay output to MANON**. Ensure the resistance between COM and NO is below 1 ohm 4. Make sure the relay output fuse is not blown Call Drake for assistance 27 | P a g e Phone: (888) 289-7299...
- Page 32 Magnum board. If not: a. Turn magnum power off for 10 seconds and power back on b. If still unresolved, call Drake 5. Verify TX light is on for at least one expansion board. If not, go to board without TX light and: a.
- Page 33 Verify unit is running properly without keypad being on i. If not, go to Appendix A: Dead Board to troubleshoot ii. If it is, replace the keypad 6. Call Drake 29 | P a g e Phone: (888) 289-7299...
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Page 34: 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 30 | P a g e Phone: (888) 289-7299 Email: drakeservice@drakechillers.com... - Page 35 (see Temperature Sensor Wiring section on page 35) Sensor 4. Check the sensor cable for any signs of damage Call Drake for assistance 31 | P a g e Phone: (888) 289-7299 Email: drakeservice@drakechillers.com...
- Page 36 Magnum and verify wiring is in the correct sequence (see Sensor wiring on page 35) 4. Check the sensor cable for signs of damage 5. Call Drake for assistance 32 | P a g e Phone: (888) 289-7299...
- Page 37 Version: 1.0 MCS – Magnum Error / Alarm Manual Appendix B Calibrating Sensors 1. Connect Physical Gauges and compare the values to the ones connected to the Magnum. If the values are within ±5, continue to Step #2. Otherwise, replace the sensor 2.
- Page 38 Version: 1.0 MCS – Magnum Error / Alarm Manual Appendix B Sensor Locations Flow Switch Suction Temperature Sensor Suction Pressure Transducer Discharge Pressure Transducer 34 | P a g e Phone: (888) 289-7299 Email: drakeservice@drakechillers.com...
- Page 39 Version: 1.0 MCS – Magnum 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) 35 | P a g e Phone: (888) 289-7299 Email: drakeservice@drakechillers.com...
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Page 40: Appendix C: Phase Monitor Faults
Version: 1.0 MCS – Magnum 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 41 Version: 1.0 MCS – Magnum 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.
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Page 42: Appendix D: Enter Password
Version: 1.0 MCS – Magnum Error / Alarm Manual Appendix D Enter Password 1. Press the Menu button on the keypad. The “Main Menu” will appear. Using the buttons, navigate to the “Passwords” option and press 2. The following screen will appear. Enter the Supervisor Password (2112) using the keypad (numbering found on bottom left of each button) and press... -
Page 43: Appendix E: Enable Run / Stop And Reset Emergency Stop
Version: 1.0 MCS – Magnum Error / Alarm Manual Appendix E Enable Run/Stop 1. After entering Supervisor Password (Appendix D), press the Menu button on the keypad. Navigate to the “Inputs” menu and press 2. Using the UP and DOWN buttons, highlight the “RUN/STOP”... - Page 44 Version: 1.0 MCS – Magnum Error / Alarm Manual Appendix E Reset Emergency Switch 6. After entering Supervisor Password (Appendix D), press the Menu button on the keypad. Navigate to the “Inputs” menu and press ▲ ▼ 7. Using the buttons, highlight the “EMG STOP”...
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Page 45: Appendix F: Change Date / Time
Version: 1.0 MCS – Magnum Error / Alarm Manual Appendix F Change Date / Time 1. After entering Supervisor Password (Appendix D), press the Menu button on the keypad. Navigate to the “Serv Tools” menu and press 2. Highlight the “Time / Date” selection and press 3. -
Page 46: Appendix G: Setting Schedules And Holidays
Version: 1.0 MCS – Magnum Error / Alarm Manual Appendix G Setting Operating Schedules 1. After entering Supervisor Password (Appendix D), press the Menu button on the keypad. Navigate to the “Serv Tools” menu and press 2. Navigate to the “Operating Schedule” selection and press on the keypad 3. - Page 47 Version: 1.0 MCS – Magnum Error / Alarm Manual Appendix G Setting Holiday Schedules 1. After entering Supervisor Password (Appendix D), press the Menu button on the keypad. Navigate to the “Serv Tools” menu and press 2. Navigate to the “Holiday Dates” selection and press on the keypad 3.
- Page 48 Drake Refrigeration, Inc. 2900 Samuel Drive • Bensalem, PA 19020 (888) 289-7299 Phone: (215) 638-5515 Fax: (215) 638-5518...
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