Contherm MITRE 4150 - Replacing the ZP22 INT PCB

MANUALP/4000_SERVICE_0712 July2012
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Servicing Procedure:
Replacing the ZP22INT PCB
The instruction below demonstrates how to replace the main controller board
ZP22INT. Suitably qualified electrical personnel should only carry out this
procedure.
Schedule of servicing:
As and when needed.
Safety requirement:
Ensure that the cabinet’s power cord is unplugged from the power source
before attempting to remove and replace the main controller board ZP22INT.
Servicing Procedure:
1. Ensure the safety requirements are in place.
2. Completely remove the top
cabinet lid by turning the 2 black
plastic fastener anti-clockwise
until it pops up & unplug the earth
wire connected to the lid.
WARNING: Ensure the cabinet is
unplugged from the main supply!
3. Locate the ZP22 interface controller board, IR CO
2
driver board & sensor
port. See photo below for the typical layout of the boards.
Lid
Plastic fastener at
both end of the lid