Pcb Renewal - Mira event Installation, Operation, Maintenance Manual

9. PCB Renewal

Warning! Isolate the electrical and water supply to the appliance before
proceeding.
Disconnect wiring by pulling on body of spade connector only and not the wire
itself.
To install a new pcb carry out the following:
Caution! Before proceeding with any electrical work on this unit ensure that the
capacitors on the printed circuit board are fully discharged. to do this, turn the
flow control knob fully 'ON' and 'OFF' again after the power has been isolated
from the unit.
Cover
retaining
screw
Temperature
knob
Flow knob
Indicator trim
9.1. Use the push-fit release tool
to lever off the temperature
knob, temperature trim and
flow knob. Unscrew the
cover retaining screw and
remove the cover by pulling
the bottom of the cover in an
outward and upward direction.
9.2. Disconnect the electrical
supply cable from the
appliance terminal block.
9.3. Remove the PCB securing
screw.
9.4. Remove the drip shields and
disconnect the PCB supply
wires from on/off micro-
switch and smaller micro-
switch. Disconnect the
pump supply wires from the
pump assembly. Disconnect
the earth wire from the PCB
terminal block.
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