User Manual

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Building Technologies M-bus System CE1P5361en
HVAC Products 8 Addendum 08.02.2007
Error code
central unit
74 Alarm input 4
92 Wrong number of meters set: During a device search run, fewer de-
vices than the number set have responded. Check setting. Check bus
connections of the M-bus devices and their settings. Check M-bus
cable.
97 List of meters full: A maximum of 750 M-bus devices can be con-
nected to the central unit. Delete the device list prior to making the
search run. If the error keeps recurring, the plant requires additional
central units.
98 Data storage full: There is not enough storage space to store the data
of all M-bus devices. Delete the device list prior to making the search
run. If the error keeps recurring, the plant requires additional central
units.
8.7.14 M-bus central unit OZW111
The OZW111 has an LED for indicating errors.
Error code
central unit
17 Bus power failure: Hardware defect of the central unit. Replace it.
71 Alarm input 1
72 Alarm input 2