UPS MKD 1500 RT
Eliminating Errors
MKD series
65
Error message
Possible cause
Remedy
Maintain battery
Alarm code: 13
The battery may
need replacing.
Contact your dealer.
Overload
Alarm code: 41/42/43
Overload
Check the loads and disconnect a few
loads that are not essential.
Check whether some loads have
failed.
Site failure
Alarm code: 04
Phase and neutral
conductors on UPS
system input
swapped.
Rotate the mains socket 180° or con-
nect the UPS system.
EPO active
Alarm code: 71
EPO function is
activated.
Switch off the EPO switch.
Bus error (Low /
High / Unsymmetrical /
Warm start)
Alarm code:
22/21/23/25
Internal UPS error
Contact your dealer.
Solar inverter error
(Low / High /
Warm start)
Alarm code: 33/32/34
Internal UPS error
Contact your dealer.
Overtemperature error
Alarm code: 81
Overtemperature
Check the UPS ventilation, the ambi-
ent temperature and the room ventila-
tion.
NTC open
Alarm code: 87
Internal UPS error
Contact your dealer.
Solar inverter short
circuit
Alarm code: 31
Short circuit output
Disconnect all loads.
Switch the UPS off.
Check whether the UPS output and
loads have short circuited.
Ensure that the short circuit has been
remedied and that there are no inter-
nal UPS errors before switching the
device back on.
Bus short circuit
Alarm code: 24
Internal UPS error
Contact your dealer.