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Frequently Asked Questions

DC Product

General Question

1. How can I initiate an RMA? I need to send my unit for repair.

Fill up the RMA form at www.alpha.ca/rma.

Cordex CXC Series Controllers

1. What does the Controller do in case of an invalid voltage reading?

The Controller can detect an invalid voltage reading. When this happens, it marks that value as "invalid" and then does not evaluate any alarms or equations based on that value.

2. What is the Communication Protocol between CXC and its peripherals?

The communication between CXC and its peripherals (Rectifiers, Converters, ADIO, BCM, etc) is CANOpen over CAN, for which we use pins 2 and 4 of a CAN cable. We have tested with CAN cables of up to 1000ft.

3. If a Rectifier is in "Power Save" mode and it loses communication with the CXC, what will happen?

After 5 minutes (to make sure this is not just a quick temporary outing), the Rectifier will revert back to "safe mode".

4. How often are the analog values in logs updated (for example, the "Current" information in the Statistics log)?

Analog values in the logs are updated every second.

5. How many CAN devices can the controller communicate with?

The controller can communicate with a maximum of 126 devices. It can acquire up to a maximum of 16 ADIO devices.

6. On CXC series controllers, which one has internal battery?

CXCR/P, CXCM, CXCM2, CXCM3, CXCM4, CXCI+ Battery part number is 185-005-10 or -19

7. How do I wire the Digital Input?

The digital input is bipolar. Connect one side to the hot bus and the other side to the relay of which the other end of the relay is connected to the common/ground bus.

8. How many temperature probes can I use and connect to the CXC controller?

Depending on the list option of the controller, normally only two. It can go up to 4 in the CXCR/CXCP if the list option includes any of these numbers; 121, 123 or 129.

9. What is the default IP factory address for the CXC controller?

It is with a Subnet Mask of

10. What is the Username and Password?

Can type in any character with the Username or can leave it blank. Password is “1234”.

11. Making changes with some parameters, when I hit Submit Changes, nothing happens.

Make sure that Pop-Up blocker is turned off. Should be under Tools Menu of the Internet Explorer.

12. Log-in in to the controller using my laptop, the web does not show up some information.

Make sure to use Internet Explorer with Compatibility View Enabled.

13. What is a TC Sensor Fail Alarm? How can I clear it?

This means there are two temperature probes installed and that the difference reading between these two probes is 5 degrees or more. It only clears when difference goes down below 3 degrees. Make sure temperature probe reading is calibrated and that not one of the probes is exposed to warmer or colder air.

14. What is a Temp Sensor 1, 2 or 3 Fail?

This means that the temperature probe connected to GP1 and GP2 or T1 and T2 are defective and needs to be replaced. Also check if the probes are connected properly, red wire on positive and black wire on negative.

15. What is Battery Runtime Low?

This means that the DC power system is running on batteries and that the remaining runtime is below the set threshold. Can find the settings under Alarms > Configure Alarms > Battery Alarms.

16. What is Battery Capacity Low?

This means the battery capacity calibration is low normally default to 80%. This is calculated by the controller every time the system goes into more than 20% depth of discharge. To clear the alarm, you can set the capacity calibration to 100% under Batteries > Configure Batteries > Capacity calibration. It is advisable to check the batteries if the controller keeps on calculating the capacity calibration lower than 80%.

17. What is a Battery OverTemp Alarm?

The temp probe connected to the batteries are measuring the temperature above the set point for Battery Overtemp. Setting can be found under Alarms > Configure Alarms > Battery Alarms.

18. How can I trigger a Battery On Discharge Alarm?

Make sure that under Batteries > Configure Batteries, “Enable SOC estimation During Discharge” (“Battery Monitor” for older software versions) is checked or enabled. Run the system on Batteries by turning off AC power to the rectifiers, battery current should register a negative current reading. Once it hits 3% DOD or below the Open Circuit Voltage setting it will trigger the alarm.

19. How can trigger a System Minor Alarm?

Turn off the AC breaker for one rectifier.

20. How can I trigger a System Major Alarm?

Turn off the AC breaker for two or more rectifiers.

21. I’m doing commissioning work and I want to simulate a Rectifier Minor and Major Alarm, how can I do it?

For rectifier minor alarm, turn off the AC breaker for one rectifier and for Rectifier Major Alarm, turn off the AC breaker for two or more rectifiers.

22. How can I check the alarm history in the controller?

Must log in to the controller with a laptop. Go to Logs and Files > Retrieve Logs Menu then open the Event Logs.

23. If I have similar systems, how can I copy a configuration file from one system to the other?

Download the config file by logging in to the controller with a laptop then under Logs and Files > Manage Configuration File menu, click on Save Full Site Configuration. To copy this to another controller, under Logs and Files > Manage Configuration File menu, click on Upload Site Configuration.

24. How can I rename a Text Label?

Log in to the controller with a laptop, then go to Logs and Files > Manage Editable Text Files menu. Look for the text label needed to renamed and make sure to save by clicking on “Submit Alarm Text Changes”.

25. Getting numerous traps even though there is no alarm on the controller, how can I fix it?

If the Master SNMP Destination under Communications > Event Notifications is set to a certain destination, the controller will wait for a response from the destination if it initially sends out a trap. If the destination is not capable for a reply back, the controller will keep on sending the trap. To fix this, the Master SNMP Destination must be set to “None”.

26. Just replaced a rectifier and still controller is showing a Comms Lost alarm, how to clear the alarm?

Need to do “Inventory Update”. With a laptop connected to the controller, go to rectifiers and click on Inventory Update. With the touch display LCD, click on the number corresponding to the rectifier symbol below the FL box then tap on Inventory Update.

Cordex HP Controller

1. What is the Username and Password?

Username and Password is the same, it is “Admin”.

2. What is the default IP address for the Ethernet ports?

By default, the rear Ethernet port of the controller is configured to acquire an IP address automatically and the front Ethernet port is configured to use a static IP address of

3. Where can I find Inventory Update?

With the Web GUI, should be under Power System > Configure System Under System Properties is Rectifier Assignment Rule. If set to Automatic it will recognize the rectifier upon install. If set to manual, you will have to manually assign it.

4. Where is the Custom Signals?

Under Controller > Advanced Functions > Custom Data
Refer to the Software Manual and look for Using Custom Data.

5. Where can I configure load Current and battery Current Source?

In Power System > Inventory, then either Load or Battery

6. A Bus State Alarm (CAN1 or 2) is present in the system. There is no device connected to the CAN.

Disable under Menu > Alarms and Event > All Alarm Settings > Select CAN bus

7. Where can I change the setting so that the controller will be able to automatically assign (recognized) the rectifiers?

Go to Power System then Configure System. Under System Properties, change the Rectifier Assignment Rule from Manual to Automatic.

8. I just removed a rectifier from the shelf and controller is giving me a “Rectifier Comms Lost” Alarm. How can I clear it?

  • Have to make the controller forget the module. Go to Modules then Rectifiers. On the module with Communications Lost alarm, click on then Forget.
  • Also in the Modules > Unassigned Modules, there is an option for “Forget All in Comms Lost”.

9. How can I back-up the configuration in the controller?

Push in a USB memory stick into the Controller. On the display, go to Shortcuts then Backup. Follow next steps.

10. Trying to add 2nd temp probe for battery temperature reading, the controller is not accepting it. How can I fix it?

Make sure that the software version is v2.01 or higher.


1. Getting Sub-Converter Alarm or Intermittent alarm on Cordex 24-48 Converter modules. The load current are not sharing evenly and jumping all over the place, how can I correct this?

Check the firmware version of the modules, make sure it is at v1.03.


1. What is the load sharing tolerance between rectifiers?

It depends which rectifier, but usually the current sharing should be between 5% to 10%. It is known that at very small loads the rectifiers do not share properly (CXRF48-2.4kW under 30% doesn’t share correctly).

2. What is a True Fail Alarm?

This is when Ramp Test under Rectifiers > Configure Rectifiers Menu is enabled. It triggers a “No Output Power” when the rectifiers are not drawing out more than 2.5% of the rectifier’s capacity. This means a very light load or none at all is connected to the power system.

3. What are Minor Alarms?

The LED will flash when a minor alarm is detected. This happens if the modules output capability has been reduced or a minor component failure is detected. See rectifier manual for more details.

4. What are Major Alarms?

The alarm LED (red) is on continuously in the event of an active Module Fail alarm; if the module is unable to source power. See rectifier manual for more details.

5. For the Cordex 48-3.6KW and 4.0KW shelf, if I used a CXCM4 on the first slot, do I need to wire AC feed into it?

No need to feed AC into slot 1, the CXCM4 controller is powered by DC not AC.

Breaker Distribution

1. In an Indoor Vista Cabinet, what are the main causes of getting a Distribution CB Alarm?

  • A breaker is in the tripped position.
  • Wrong breaker is used, must all be a Mid-Tripped type breaker.
  • A conductive material; i.e. a piece of wire, is trapped at the back of the distribution alarm board causing a contact between the board pattern and the main hot bus.
  • For more information, click on the link for a you tube video with detailed troubleshooting process. http://www.youtube.com/watch?v=sMIRux-EgtY&feature=player_embedded


1. Why is the input breaker and wire feed size larger when you have MBS on the same Amps80 rating?

The amount of apparent power is higher than the real power and the Amps80 corrects the difference.

2. What is Input Source?

This is to set the Input Priority for the Inverter modules, AC or DC source. 100% is for DC and 0% is for AC.

3. What is AC input mode?

At normal operation is at “Normal”. Only set to Safe mode when doing maintenance to avoid voltage feedback upstream. Safe mode only works when Input Source is set to DC.

4. What does alarm 244 means?

The history file reached its limit possible due to succession of abnormal events that happened in the system. To clear the alarm, will need to Save the Inverter History File. Log in to the controller with a laptop then at Inverters > Retrieve History File, save the logs in a known folder in the laptop. Open the file with either word pad or note pad to check for any possible issues. Alarm should clear after saving the inverter history file.


1. What is the default password?

It is “1111”.

2. Have changed the default password, is there a back door password?

It is “fReD”.

3. Can’t log-in via web interface, how can I reset the IP address to factory default?

Press and hold the reset button in the communication card for about 3 secs.

4. During a short circuit condition, how long can this be sustained?

In Line Mode, it will trip the input breaker and go to Standby Mode. In Inverter Mode, after 2 cycles, it will shutdown.
  • Normally, the short circuit current is double the current rating.

5. What is the Over Load Condition for the FXM units?

As long as overload is <110%, inverter will run continuous. Load between 115% and 125%, unit will run for 2 mins. Above 125%, at inverter mode, unit shuts down instantaneously and runs till breaker trips in line mode.

6. Is there a way to power cycle the output of the unit?

This feature is not present in the firmware at this point in time. One option to cycle the output of the unit is using the Keep Alive option. Call tech support for details or refer to the FXM manual.

7. The UPS is showing “Weak Battery” alarm, battery was replaced and still showing the alarm, how to clear the alarm?

To clear the alarm, either do a short battery test or power cycle the unit (Input DC and AC breakers turn off).

8. Is there any effect on the unit’s functionality if Temp probe is not connected?

The unit will not charge the batteries.

9. Is the Neutral between AC input and output connected together?

Except for FXM350, in both Line and Inverter mode, the neutral is connected between AC input and output. For the 350, when in inverter mode, the neutral gets switched to the Earth Ground. This provides a continues bonding between neutral to earth.


1. What is the baud rate setting to connect to a UPS.

Should be auto sensing. Connect USHA then turn ON.

2. What is the default username and password for the USHA?

'AlphaLink' and 'admin' as the username and password

Bypass Switch

What is the correct mounting kit for Bypas Switch 017-183-24?

No mounting kit required. The mounting bracket is part of the cover. The cover can be orientated so the bracket faces to the front or the back.


SE48-1616 (Formerly AOES6)

1. Where is the thermostat that controls the fan?

It is located inline with the fan.

2. What are the threshold setting for the thermostat?

Thermostat turns fan on at 49°C (120°F) and turns fan off at 32°C (90°F).