User's Manual

Page 26 Manual MF0133AUA.doc
5. MAINTENANCE
Read the health and safety warnings in chapter 1.2.
 Note: The remote unit does not require preventative maintenance
measures.
Maintenance of the ION-Mxxx should be performed on an FRU (Field Replaceable
Unit) basis only. Do not damage the warranty labels on the components, as this voids
the warranty.
The spare parts list contains only units that can be replaced without tuning or
soldering work.
 Note: When sending back the unit, use an appropriate packaging, see
chapter 5.4.4 Environmental and Safety Specifications of ION-
M1
7P/26EU. We strongly recommend using the original packaging!
 Note: Defect parts should only be replaced by original parts from the
supplier. All interventions inside the housing are at one’s own risk.
 Note: During maintenance ensure that the unit has been disconnected
from mains.
 Note: Before disconnecting any cables, label any unlabelled cables to
ensure correct reconnection.
To replace an FRU, use the appropriate tools. Replacement tools may be ordered
from the supplier. All screws have a right-hand thread, turn the tool clockwise for
tightening and counter-clockwise for loosening.
Do not over-tighten the connectors or screws. The table below shows various screws
with their respective torques.
Screw Type Tallow-drop Socket-head-cap Countersunk-head
Thread size Specified Torque (in Ncm)
M 2.0 40 not in use 40
M 2.5 82 not in use 82
M 3.0 145 100 145
M 4.0 330 330 330
M 5.0 650 tbd. 650
table 5-1 Specified torques for various screw types
If any FRU not contained in the following chapter needs to be replaced, contact
customer service for additional instructions.