MCS MCS-Magnum Operating instructions

Revision 2.05B
MCS-Magnum Controller System
Simplied Description and Troubleshooting
Plus MCS-MAGNUM Alarms and Safeties
Revision 2017-11-07

2
The MCS Commitment
Our commitment is to provide practical solutions for the industry’s needs and to be both
a leader and a partner in the effective use of microprocessor controls.
Micro Control Systems, Inc.
5580 Enterprise Parkway
Fort Myers, Florida 33905
USA
Phone: [phone]
Fax: [phone]
www.mcscontrols.com
Information contained in this manual has been prepared by Micro Control Systems, Inc. and is company
condential and copyright ©protected 2017.
Copying or distributing this document is prohibited unless expressly approved by MCS.

3
Table of Content
MCS-MAGNUM CONTROLLER TROUBLESHOOTING
1.1. Troubleshooting General Dead Board Symptoms.........................................................................................................................................................6
1.2. Troubleshooting Sensor Input Problems.......................................................................................................................................................................7
1.3. Troubleshooting Relay Output Problems ......................................................................................................................................................................8
Appendix A
1.4. Entering Authorization Codes to Log In and Out of a Magnum.....................................................................................................................................9
Appendix A (continued)
1.5. Entering Authorization Codes to Log In and Out of a Magnum...................................................................................................................................10
Appendix B
1.1. Manually Turning On and Off a Magnum Relay Output ..............................................................................................................................................11
Appendix B (continued)
1.2. Manually Turning On and Off a Magnum Relay Output ..............................................................................................................................................12
Appendix C
1.1. Determining and Changing the Network Address of a Magnum .................................................................................................................................13
Appendix C (continued)
1.2. Determining and Changing the Network Address of a Magnum .................................................................................................................................14
Appendix D
1.1. Sensor Input Reference Table.....................................................................................................................................................................................15
Appendix D (continued)
1.2. Sensor Input Reference Table.....................................................................................................................................................................................16
Appendix E
1.1. Analog Sensor Input Reference Table ........................................................................................................................................................................17
Appendix F
1.1. MCS-UPC Status LED Code Descriptions..................................................................................................................................................................18
Magnum Alarms and Safeties
1.1. There are four types of alarms that are generated by the Magnum control logic:.......................................................................................................19
1.2. Information Only Alarms..............................................................................................................................................................................................19
1.2.1 System Generated Alarms.................................................................................................................................................................................19
1.2.2 User Initiated Alarms..........................................................................................................................................................................................20
1.2.3 Automatic Alarms...............................................................................................................................................................................................20
1.3. Magnum System Alarms .............................................................................................................................................................................................20
1.3.1 Conguration Alarms .........................................................................................................................................................................................20
1.3.2 MCS Local Network Alarms ...............................................................................................................................................................................21
1.3.3 Key Sensors Alarms ..........................................................................................................................................................................................21
1.3.4 Emergency Stop Alarm ......................................................................................................................................................................................21
1.4. Setpoint safety alarms.................................................................................................................................................................................................21
1.4.1 Sensor Inputs Used With Magnum Setpoint Safeties:.......................................................................................................................................22
1.4.2 Setpoint safeties................................................................................................................................................................................................22
1.5. TurboCor Compressor Alarms.....................................................................................................................................................................................24

4
MCS-MAGNUM CONTROLLER TROUBLESHOOTING

5
Measure voltage at ac
input connector block and
verify that it is within 10
percent of rated voltage
Troubleshooting General Dead
Board Symptoms
Voltage
ok?
Ac input
fuse blown?
Replace fuse. If
fuse blows again
replace board
Correct ac supply
to board
Start
Press RESET
button on board
Is red RESET
light on all the
time?
Is green
16VDC light
on?
Magnum Micro Controller Systems
If board has a
voltage selector
switch, is it set
correctly?
Turn power off, set
switch to correct
voltage, turn power on
Turn power off, wait
10 seconds, turn
power back on
Board was locked up
due to momentary
power dip or spike
Problem
solved?
Board was locked up
due to momentary
power dip or spike
Replace board
Is board a
Magnum?
Problem
solved?
Press RESET
button on board
Turn power off, wait
10 seconds, turn
power back on
Board was locked up
due to momentary
power dip or spike
Problem
solved?
Board was locked up
due to momentary
power dip or spike
Problem
solved? Replace board
Replace board
Is LCD
backlight on? Try to reload
software Problem solved?
Replace board
Software was
corrupted
Yes
Yes
Yes
Yes Yes
Yes
Yes
Yes
Yes Yes
Yes
Replace board
Yes
No
No
No
No No
No
No
No
No
No
No
1.1. Troubleshooting General Dead Board Symptoms

6
Start
Are ALL sensors
on the board not
responding?
Go to any sensor input
on the board and
measure dc voltage
from +5 pin to ground
4.75 to 5.25
volts dc?
Yes
Remove all sensor blocks
from board, wait 10 seconds,
then measure dc voltage
from +5 pin of any sensor
input on board to ground
No
4.75 to 5.25
volts dc?
Turn power off to board
and measure for short
from +5 pin of any sensor
input on board to ground
No
Shorted?
Replace board
No
Board is defect and may
have been damaged by
overvoltage applied to a
sensor input
Replace board
Yes
Go to defect sensor input
and remove connector
block
üü
correctly?
No
Defect sensor or
wiring to sensor
Yes
Yes
Yes
Board is defect and may
have been damaged by
overvoltage applied to
the sensor input
If system uses expansion boards,
verify MCS-I/O communication by
seeing if red TX light blinks on all
boards and also check for proper
address jumper settings on all
expansion boards
Check that all sensor input
Analog / Digital jumpers
are set correctly and all
sensors are set to AUTO
No
If ANALOG sensor, connect
MCS-SENSOR-TEST block (100K ohm
1/4 watt resistor from +5 pin toSI pin on
connector base) and compare sensor
reading to Appendix J
If DIGITAL sensor,
connect jumper wire from
+5 pin to SI pin on
connector base and see if
sensor reading changes
from ON to OFF or OFF to
ON
Troubleshooting Sensor
Input Problems
Magnum Micro Controller Systems
Reconnect Sensor 1 and
measure dc voltage from
+5 pin of any sensor
input on board to ground
4.75 to 5.25
volts dc?
The sensor or wiring to
sensor you just
reconnected is shorted
to ground
Reconnect the next sensor
and measure dc voltage
from +5 pin of any sensor
input on board to ground
Yes
No
1.2. Troubleshooting Sensor Input Problems

7
Start
Are ALL relays
on the board not
responding?
Turn power off,
wait 10 seconds,
turn power back on
All relays
work now?
Yes Replace board
Go to defect relay
output, remove
connector block and set
relay to MANOFF
At the connector base
is there less than 1
ohm of resistance
beween COM and
NC?
No
Set relay to
MANON
Yes
If system uses expansion boards,
verify MCS-I/O communication by
seeing if red TX light blinks on all
boards and also check for proper
address jumper settings on all
expansion boards
Check that all relays
are set to AUTO
(See Appendix H)
No
No
Board was locked up
due to momentary
power dip or spike
Yes
Is the relay
output fuse
blown? Replace board
No
Replace fuse and set relay to
AUTO If fuse blows again after
putting system back into normal
operation, problem is due to
defect outbound control device
or a short in the wiring.
Yes
At the connector base
is there less than 1
ohm of resistance
between COM and
NO?
Replace board
No
Board is ok. Set relay to AUTO and
check wiring from relay output
connector block to outbound controlled
device. Also, if board is a MCS-I/O or
RO8 refer to Appendix K for possible
snubber network leakage issues and
how to overcome them.
Yes
Troubleshooting Relay
Output Problems
Magnum Micro Controller Systems
1.3. Troubleshooting Relay Output Problems

8
1.4. Troubleshooting Lost I/O Communication Problems
9
Start
Is TX I/O light
on the Magnum
blinking?
Locate expansion
board where TX
LED is not blinking
Does board
have power?
Replace fuse. If fuse
blows again, replace
expansion board
Ac input
fuse blown?
No
Yes
Replace expansion
board
Yes
Check wiring to ac
input block
No
No
Verify that MCS I/O
termination jumper is
on first and last board
only
On Magnum board,
turn power off, swap
chips U12 and U13,
turn power back on
No
Yes
Does TX light on
at least ONE
expansion board
blink?
Yes
Yes
On Magnum board,
turn power off, swap
chips U12 and U13,
turn power back on
Does TX light on at
least ONE
expansion board
blink?
No
Chip that was in
U12 is defect
Yes
Replace Magnum
board
No
Verify that address
jumpers on all
expansion boards are
set correctly
Turn power
off to
Magnum for
10 seconds,
turn power
back on
Does TX I/O light
on the Magnum
blink now?
Magnum was locked
up due to momentary
power dip or spike
Troubleshooting Lost I/O
Communication Problems
Magnum Micro Controller Systems
Replace Magnum
board
No
Yes
Does TX I/O light
on the Magnum
blink now?
Chip that was in
U12 is defective
Verify that MCS I/O
wiring between boards
is correct, especially
polarity

9
Appendix A
1.5. Entering Authorization Codes to Log In and Out of a Magnum
First, at the Main Menu use the arrow keys to navigate to Passwords:
Next, press the Enter key. You will see the following:
Now enter the proper four-digit authorization code. Each - is changed to a
*as numbers are entered. After you have keyed in the numbers,
press the Enter key.
09:56 Main Menu
-Status -Setpoints
-Outputs -Serv Tools
-Inputs -Lckout RST
-Alarms -Lckout ALM
-Graphs -Passwords
Help
09:56 Password
Enter Pin
- - - -
Then Press ‘ ‘ Key
F1 F2 F3
09:56 Password
Enter Pin
****
Then Press ‘ ‘ Key
F1 F2 F3

10
Appendix A (continued)
1.6. Entering Authorization Codes to Log In and Out of a Magnum
The Magnum will tell you if it accepted your code and the level of authorization.
For example,
if you entered a valid factory authorization code you will see the following:
If you entered an invalid authorization code you will see the following:
Once you are logged in you can log out immediately by simply entering any invalid
authorization code. If you are logged in and no keys are pressed for more than 15
minutes the Magnum will automatically log you out, warning you shortly before with how
many seconds remaining as shown here:
09:56 Password
Level – VIEW ONLY
Invalid
Pin
Then Press ‘ ‘ Key
F1 F2 F3
Press Any Key
to Avoid
Auth Log Out
60
09:56 Password
Level – Factory
Then Press ‘ ‘ Key
F1 F2 F3

11
Appendix B
1.1. Manually Turning On and Off a Magnum Relay Output
Note: If a relay is in a Lockout state you cannot manually turn it on or off.
First, after logging into the Magnum with your authorization code
(see Appendix A), use the arrow keys to navigate to Outputs:
Next, use the up and down arrow keys to highlight the relay you want to
turn on or off:
Now press the Enter key. You should see something similar to the following:
09:56 Main Menu
-Status -Setpoints
-Outputs -Serv Tools
-Inputs -Lckout RST
-Alarms -Lckout ALM
-Graphs -Passwords
Help
09:56 Outputs 
Relays Status
M-1 COMP1-1 Off.
M-2 LOAD1-1 Off
M-3 UNLOD1-1 Off
M-4 LLS1-1 Off
Anlog .PGPG
09:56 Outputs 
Relays Status
M-1 COMP1-1 Off.
M-2 LOAD1-1 Off
M-3 UNLOD1-1 Off
M-4 LLS1-1 Off
Anlog . PGPG
COMP1-1
Manual AUTO ,
Status

12
Appendix B (continued)
1.2. Manually Turning On and Off a Magnum Relay Output
Use the up and down arrow keys to cycle through the three modes for the relay output:
AUTO, MANON or MANOFF
Stop when you reach the one you want:
Finally, press the Enter key to make the change. In our example the relay
output is now manually turned on as shown here:
Remember to return the relay output to AUTO mode when you are done!
09:56 Outputs 
Relays Status
M-1 COMP1-1 Off.
M-2 LOAD1-1 Off
M-3 UNLOD1-1 Off
M-4 LLS1-1 Off
Anlog PGPG
Change Made
09:56 Outputs 
Relays Status
M-1 COMP1-1 Off.
M-2 LOAD1-1 Off
M-3 UNLOD1-1 Off
M-4 LLS1-1 Off
Anlog PGPG
COMP1-1
Manual MANON
Status

13
Appendix C
1.1. Determining and Changing the Network Address of a Magnum
First, at the Main Menu use the arrow keys to navigate to Serv Tools:
Next, press the Enter key. You will see the following:
Use the up and down arrow keys to highlight Address:
09:56 Main Menu
-Status -Setpoints
-Outputs -Serv Tools
-Inputs -Lckout RST
-Alarms -Lckout ALM
-Graphs -Passwords
Help
09:56 Serv Tools
-RS-485 Network 1.
-Ethernet Network
-System Info
-Time / Date
-Display
PGPG
09:56 RS-485 Setup
Protocol MCS
Address 1 .
Baud Rate 19200
Back,

14
Appendix C (continued)
1.2. Determining and Changing the Network Address of a Magnum
Now press the Enter key. You should see something similar to the following:
Use the up and down arrow keys to select the Address number:
Finally, press the Enter key to make the change. In our example the RS-485 network address
has been changed from 1 to 2:
09:56 RS-485 Setup
Protocol MCS
Address 1 .
Baud Rate 19200
Back,
Address
1
09:56 RS-485 Setup
Protocol MCS
Address 1 .
Baud R 00
Back,
Address
2
09:56 RS-485 Setup
Protocol MCS
Address 2 .
Baud Rate 19200
Back,
Changes Made

15
To troubleshoot analog sensor input problems and determine where the problem is, simply remove the sensor input connector block of the
input you want to test and plug in a MCS-SENSOR-TEST block. If you do not have a MCS-SENSOR-TEST block you can connect a 100K ohm
1% ¼ watt resistor between the +5 and S1 pins of the suspect sensor input on the board with the original sensor connector block removed.
After you have done this, compare the reading displayed by the Magnum with the table of the most common sensor types on the right. If the
reading is close to what is found in the table for that particular sensor type you can safely assume that the board is functioning normally and
that the problem lies with the sensor itself of the wiring from the sensor to the board.
Appendix D
1.1. Sensor Input Reference Table
Sensor Type Reading
600VAC4 337.8V
A FLW % -99.9%
A100x2 -99.9A
A250x2 -99.9A
AIR AVG -99.9A
AKS31R5 -98.8P
AKS32-2 71.6P
AKS32-5 179.0P
AMPS100 -99.9A
AMPS250 -99.9A
ATPE500 999.9F
CARR-5K* 77.0F
CDUCT'Y 499u
CFM .25 -999c
CFM 1in -999c
C-I AMB -99.9F
C-I FLW -999
C-I IN -99.9F
Sensor Type Reading
C-I OUT -99.9F
CT-100 57.0A
CT10010 5.6A
CT10017 99.3A
CT100d2 28.5A
CT100d3 19.0A
CT100d5 76.7F
CT100d7 -99.9A
CT100x2 115.0A
CT10d25 2.1A
CT-1500* 865.0A
CT-250 143.5A
CT25017 248.6A
CT250x2 287.6A
CT300 149.7A
CT300d10 15.0A
CT300d2 75.4A
CT300d5 30.1A
Sensor Type Reading
CT300x17 256.5A
CT300x2 287.0A
CT500 287.6A
CT50017 498.2A
CT50035 931.0A
CT500x2 575.3A
CT750 429.4A
CT800 448.0A
DEC1NOCH -99.9
DEC2NOCH -9.99
DEMAND%* 87.5%
DIFF100 -99.9P
ECLIP-1 -99.9P
ECLIP-2 100.0P
ECLIP-5 250.2O
HB350 174.9P
HB700 350.0P
HUMD 54.0%

16
Appendix D (continued)
1.2. Sensor Input Reference Table
Sensor Type Reading
HUMD2 54.0%
LD1000 500p
M 50-KW 43.6K
M 75-KW 65.1K
M100-KW 86.6K
MCS 667 100.0P
MCS CO2 1001p
MCS-200 100.0P
MCS-500 100.0P
MCST100 77.0F
MCSX400 99.9P
MCSX500 99.9P
MEDIA-5 -99.9P
METER P -999p
PT 1000* 169.0F
PT100 213.1F
R22 PPM 500p
REF LVL 50%
ROSE300 113.0P
ROSE500 188.6P
RPM'S -999R
S FLW T -999%
S TMP T -999F
SAFMAG -99.9G
Sensor Type Reading
STAEFA -99.9”
STAT 50 23.5”
STAT CO2 -999p
STAT.25 -9.99”
STAT0.2 0.07”
STAT1 % 1233.6%
STAT1 F 1233.6%
STAT2 % 4.8%
STAT2 F -99.9F
STAT3 % -99.9%
STAT3 F -99.9F
STAT4 % -99.9%
STAT4 F -99.9F
STATIC.2ib 0.10”
STATIC1 -99.9”
STATIC3 -99.9”
STATIC5 1.8”
STATIC5iB 2.50”
T100LOW .999p
TI-150 60.3P
TI-150A 75.0P
TI-2ACE 110.2A
TIACE17 190.8A
TONS 1DEC -99.9T
Sensor Type Reading
VAC-600 326.6V

17
Magnum Alarms and Safeties
1.1. There are four types of alarms that are generated by the Magnum control logic:
Information only alarms,
Magnum system alarms and
Chiller Setpoint safety alarms
TurboCor Compressor Alarms
All alarms have the same format. The alarm is identied and is date/time stamped. Alarms can be viewed from the Magnum keypad by selecting the
‘Alarms’ from the main menu, or through MCS-Connect.
1.2. Information Only Alarms
1.2.1 System Generated Alarms
The following alarms are generated to provide information; they will not cause a change in the control algorithm such as a lock out condition or a
Relay Output being forced off.
POWER FAILED – Generated when power to the Magnum was lost.
POWER RETURNED – Generated when power to the Magnum returned.
HW DATE INVALID – The date contained/read from the hardware real time clock chip is not valid. Check battery voltage, it should be
> 2.0 vdc.
HW TIME INVALID – The time contained/read from the hardware real time clock chip is not valid. Check battery voltage, it should be
> 2.0 vdc.
SW DATE INVALID – The date contained/read from the software clock is not valid.
SW TIME INVALID - The time contained/read from the software clock is not valid.
RAM INTEGRITY – the data contained in the battery-backed up RAM memory may be corrupted. This does not stop the Magnum
from running. It means the historical data may be incorrect (run times, cycles, min/max values, and trend/graph data).
WATCHDOG RESET – The Magnum has reset itself because of improper operator of the Magnum board. Please consult the manu-
facturer if this alarm has occurred.
LOST A/D CONVTR – The Magnum microprocessor has lost communications to the Analog to Digital converter chip (chip that con-
verts sensor voltages to a digital number). Check for a shorted sensor that may cause
LOST DISPLAY – Generated when communication to the Keypad/Display is lost.
CF INIT ERROR – The Compact Flash card that was installed cannot be initialized and therefore cannot be used. Replace the Com-
pact Flash card with one that works.
BATTERY FAILED – Generated when Magnum is not getting power from the Battery.

18
1.2.2 User Initiated Alarms
The following alarms indicate that an individual took action: (Most require proper authorization)
LOCKOUT RESET – Generated when a user resets a compressor other unit from a locked condition.
COMPUTER RESET – Generated when the manual reset button on the Magnum is pressed.
ALARMS CLEARED – Generated when a user clears the alarm history.
STPT CHANGED – Generated when a user makes a change to a Setpoint; the number of the Setpoint will also be displayed with the
alarm.
RO TO (Selected Condition) – Generated when a user manually changes the condition of a Relay Output (either AUTO, MANON, or
MANOFF).
AO TO (Selected Condition) – Generated when a user changes the condition of an Analog Output (either AUTO or MANUAL. If
MANUAL, then a dialog box will appear to input the number value).
SI TO (Selected Condition) – Generated when a user changes the condition of a Sensor Input (If a digital input, then either AUTO,
MANON, or MANOFF. If an analog input, then either AUTO or MANUAL. If MANUAL, then a dialog box will appear to input the number
value).
POINT INFO CLEAR – Generated when a user clears all point information (run times, cycles, min/max values, etc.).
CLOCK SET – Generated when a user makes a change to the Magnum real time clock.
CFG DOWNLOADED – Generated when a user uploads a new conguration le into the Magnum.
ETHERNET CHANGE – Generated when a user makes a change to the Ethernet settings through the Keypad/Display.
RS485 CHANGED – Generated when a user makes changes to the RS485 address through the Keypad/Display.
CF CARD INSERTED – Generated when a user inserts a Compact Flash memory card into the Magnum.
CF CARD REMOVED – Generated when a user removes a Compact Flash memory card from the Magnum.
1.2.3 Automatic Alarms
The following alarms indicate an action that the Magnum made automatically:
ROTATED LEAD – Generated when the Magnum automatically rotates the Lead Compressor.
DAYLIGHT SAVINGS – Generated when the Magnum automatically changes the real time clock to adjust for Daylight Savings Time.
1.3. Magnum System Alarms
1.3.1 Conguration Alarms
These alarms indicate a problem with the conguration le in the system. The system is not operational and a new conguration must be transmit-
ted to the unit through MCS-Connect.
INVALID CONFIG – Checksums are incorrect.

19
INVALID CFG VER – The version number of the conguration is invalid.
INVALID CFG TYPE – The conguration type does not match the software type.
1.3.2 MCS Local Network Alarms
These alarms indicate problems with the MCS local network:
LOST SI COMM #_ / LOST RO COMM #_–Generated when communications to a Sensor Input or Relay Output board is lost. The
number of the board will be displayed with the alarm. The system can be accessed but will be in a NO RUN- I/O LOST state.
MCS-STAT OFFLINE – The Magnum has lost communications to the MCS-STAT.
LOST IO SHUTDOWN – Generated when Magnum is running and there are no communications to one or more of the I/O boards. The
system can be accessed but will be in a NO RUN- I/O LOST state.
LOST I/O RESTART – Generated when the Magnum does an automatic reset once I/O communications are restored.
1.3.3 Key Sensors Alarms
These alarms indicate a problem with a key sensor, it is either shorted or open. The alarm will contain ALARM followed by the 10-character name
of the sensor. The following sensors related to the entire system are tested:
Leaving temperature: If failed, then Lock Out the system.
Returning temperature: If failed, then alarm only no Lock Out.
Ambient temperature: If failed, then alarm only no Lock Out.
The following compressor sensors are tested. If they fail, then that compressor only is locked out:
Suction pressure and temperature
Discharge pressure and temperature
Oil pressure and temperature
Motor temperature (if an analog input)
1.3.4 Emergency Stop Alarm
EMERGENCY STOP – Generated when the emergency stop switch has been turned on. The system can be accessed but is in a Lock
Out state.
1.4. Setpoint safety alarms
The Magnum algorithm incorporates a number of safety checks, based on Setpoints, preventing unsafe conditions that could potentially cause
damage to the system. When a safety trips the circuit will be in a SAFETY TRIPPED state. The circuit will remain in this state for the time in the
‘Safety Down Time (min)’ cell and then move to the CMP ANTICYCLE or CMP IS OFF state where the compressor will be allowed to run again
if required. If the same safety trip occurs again within the time in the ‘Lockout Delay Hrs’ cell since the rst trip, the circuit will be set to CMP
LOCKED OUT state, which requires a manual reset to restart the compressor. If the lockout delay time is set to zero, the Magnum will generate a
lockout condition the rst time that the safety occurs.

20
1.4.1 Sensor Inputs Used With Magnum Setpoint Safeties:
Suction Pressure(Analog or Digital)
Discharge Pressure (Analog or Digital)
Oil Pressure (Analog or Digital)
Oil Differential Pressure (Calculated value)
Oil Temperature (Analog or Digital)
Discharge Temperature (Analog or Digital)
Motor Temperature (Analog or Digital)
Motor Amps (Analog or Digital)
Motor Fault (Analog or Digital)
Liquid Temperature (Analog Only)
Compress Proof (Digital Only)
Flow Switch (Digital Only)
1.4.2 Setpoint safeties
For a safety trip to occur, both the Sensor Input and the associated Setpoint must be active. If a safety trips, the alarm name will consist of the
Setpoint name plus additional identication such as point number, compressor number, or 30 second history leading up to the trip if applicable.
Note: Most safeties are checked only if the compressor is running, however if the safety is always checked it will be noted.
The following is a list of safeties that are incorporated in the standard chiller algorithm control. These safeties are checked every second. For a
system with multiple circuits, each one is tested individually. If a safety trip occurs, only that respective compressor will be affected, the others will
continue to function normally.
Freeze Protection (SAFETY IS ALWAYS CHECKED)
If the leaving temperature drops below the Setpoint value then the entire system will Lock Out and a FREEZE alarm will be generated. There is
also an option to have one freeze protect for each individual circuit. Refer to section 11 Setpoint #111.
No Flow Protection
If a ow switch is used, then the entire system will be Locked Out if Setpoint #105 is active. If the Setpoint is inactive, the Magnum will determine if
there is a second pump, if so it will be started. Else, the system will shut down and automatically restart when the ow switch is on, indicating ow
has returned. There is also an option to have a ow switch for each individual circuit. Refer to section 11 Setpoint #105.
Phase Loss Protection
Phase loss, as indicated by the phase loss monitor, will result in the entire system being Locked Off and a phase loss alarm will be generated. If
Setpoint #166 is inactive the Magnum will wait for 2 seconds before the Lock Out occurs. The alarm will be PHASE LOSS and no restart will be
attempted. If Setpoint #166 is active, the name of the Setpoint will be in the message. Refer to section 11 Setpoint #166.