CAIRE NewLife Elite, Technical Manual, Page: 32 / 49

MN240-1 Rev C
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5.7 Circuit Board
The solid-state printed circuit board controls the timing operation of the five solenoid
valves and the alarm system functions.
Consult the troubleshooting chart in Section 6.0 to determine when to replace the printed
circuit board.
The Printed Circuit Boards (PCBs) contain components that are sensitive
to electrostatic discharge (ESD) and can damage the board if not handled
properly. As when handling any ESD-sensitive PCB, observe standard
ESD safety procedures.
5.7.1 Circuit Board Replacement
Circuit Board Removal
To remove the circuit board, follow the steps below:
1. Set the unit’s ON/OFF switch to the OFF position and disconnect the power
cord.
2. Remove the side and back panels.
3. Disconnect all connections from the circuit board.
4. Cut the tie-wrap at the circuit board pressure transducer and disconnect the
green tube from transducer.
Care must be taken when removing and installing tubing to circuit
board sensor to prevent damaging sensor.
5. Push in on the circuit board support tabs while you lift each area of the
circuit board to remove circuit board from the control panel.
Circuit Board Installation
To install the circuit board, follow the steps below:
1. Push the circuit board on to the support tabs.
2. Install green tubing to the top barb of transducer located on the circuit
board. Secure with the tie-wrap.
3. Carefully align and firmly install all connections to the circuit board so that
the connector’s tab locks securely into place.
4. Reconnect the back and side panels.