Table of Contents
Advertisement
Operating and Maintenance Instructions
6.2 Warning indications
Contrasting to a communication loss or a fan alarm, the MDC will not jump to a fan's status screen in the case of a
warning. Instead, the MDC will switch on the yellow LED, and once that fan's status screen has been located, the
fan will have its status changed to "Warning". Figures 21 and 22 below show a single fan that has two warnings:
Yellow
LED on
Figure 21 - Example of a first warning on a fan
When a fan has more than one warning, they will be displayed in sequence on the same line, approximately 3
seconds apart from each other e.g. Figures 20 and 21 above are separated by approximately 3 seconds.
Note: If the fan is switched off after experiencing alarms or warnings, the MDC will, in most cases, save
those alarms and/or warnings into their respective holding registers, which are accessible via the MDC's RS485
slave port. These holding registers will be defaulted to '0' if the MDC is power cycled.
7.0
Replacing a MDC unit
If a MDC unit becomes faulty and needs to be replaced, ensure the new MDC is at its factory default settings and
then select "Fan Addressing" and "Existing Fan Array" on its Main Menu. The MDC will then verify the current array.
After verification, select the exact number of fans in the array and confirm using ENTER button twice. The MDC
will then power cycle and display the status screen of Fan 1 after retrieving the information from the fan array.
Note: The new MDC will not identify any set points or configuration parameters from its predecessor other
than the fan speed control method e.g. Analogue 0-10V or RS485 because that is stored in the fans.
Note: The new MDC must be manually re-configured in order to fully match its predecessor settings such
as Operating Mode, Alarm Mode, BMS settings, etc.
For more information see H2 – Fan Addressing - Existing Fan Array - Initial Setup.
8.0
Transport & Storage
•
PCBs should be transported in anti-static build-up bag or static dissipative bags.
•
Store in a dry environment
•
Storage temperature: -30°C to +70°C.
9.0
Maintenance and servicing
There are no user serviceable parts
210-OMI14229-Iss2
© ebm-papst UK Ltd 2018
Figure 22 - Example of a second warning on a fan
Operation & Maintenance Instructions
Chelmsford Business Park Chelmsford Essex CM2 5EZ
Telephone: +44(0)1245468555 Fax: +44(0)1245466336
e-mail
sales@uk.ebmpapst.com
Warning
Counter
Page 24 of 45
Advertisement
Table of Contents
