Eaton BladeUPS none User Manual - page 51
Eaton BladeUPS Maintenance Bypass Module (MBM) User’s Guide 164201785—Rev 2 www.eaton.com/powerquality
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Chapter 9
Troubleshooting
The BladeUPS Maintenance Bypass Module (MBM) is designed for durable, trouble-free operation. Use the
following section to determine the cause of minor problems.
Trouble Conditions
The following table describes possible trouble conditions. See Figure 28 for fuse and indicator locations.
Condition
Possible Cause
Action
The UPS Input indicator does not
illuminate, but the MBM operates
normally.
Fuse F5 is open.
Check the fuse and replace with same type and rating (1A, 250 Vac).
If the condition persists, contact your service representative.
LED DS5 is defective.
Contact your service representative.
The UPS Output indicator does not
illuminate, but the MBM operates
normally.
Fuse F4 is open.
Check the fuse and replace with same type and rating (1A, 250 Vac).
If the condition persists, contact your service representative.
LED DS4 is defective.
Contact your service representative.
The Critical Load indicator does not
illuminate, but the MBM operates
normally.
Fuse F3 is open.
Check the fuse and replace with same type and rating (1A, 250 Vac).
If the condition persists, contact your service representative.
LED DS3 is defective.
Contact your service representative.
The UPS Bypass Mode Active indicator
does not illuminate, but the MBM
operates normally.
Fuse F2 is open.
Check the fuse and replace with same type and rating (1A, 250 Vac).
If the condition persists, contact your service representative.
LED DS2 is defective.
Contact your service representative.
The bypass status signal wiring from the
BladeUPS to the MBM is disconnected or
defective.
Verify the bypass status signal wiring is connected and has continuity
(see “Communication” on page 23).
If the condition persists, contact your service representative.
The UPS relay output is not configured
properly.
Configure the UPS relay output to On Bypass (refer to the BladeUPS
user's guide).
If the condition persists, contact your service representative.
REPO does not activate.
Fuse F1 is open.
Check the fuse and replace with same type and rating (1A, 250 Vac).
If the condition persists, contact your service representative.
The REPO signal wiring from the MBM to
the REPO switch is disconnected or
defective.
Verify the REPO signal wiring is connected and has continuity (see
If the condition persists, contact your service representative.
The UPS does not transfer to Bypass
mode when the MBM Activate UPS
Bypass Mode pushbutton switch is
pressed.
The bypass utility does not qualify.
Check the bypass utility. The UPS is receiving bypass utility power that
may be unstable or in brownout conditions.
Bypass mode is disabled.
Verify the Usage of Bypass user setting on the BladeUPS is Enabled
(refer to the BladeUPS user's guide).
The activate bypass signal wiring from the
BladeUPS to the MBM is disconnected or
defective.
Verify the activate bypass signal wiring is connected and has continuity
(see “Communication” on page 23).
If the condition persists, contact your service representative.
The UPS signal inputs are not configured
properly.
Configure the UPS signal input 2 to Request Bypass (refer to the
BladeUPS user's guide).
If the condition persists, contact your service representative.
Power is not available at the MBM output
terminals.
The MBM UPS Input and Bypass breakers
are open.
Close the breakers.
The REPO switch is active.
Reset the REPO switch and close the Bypass breaker.