Ugolini MiniGEL Manuel De Service page 42

disconnecting the board from the connectors.
3 Connect the programmer to the MC1 connector shown in the figure. Connect the machine to the mains and switch on the
master switch. The green PROGRAMMING light on the programmer will come on to confirm that it is connected to the board
correctly and that the board is powered. Press the programming button on the programmer. The green PROGRAMMING light will
flash for a few seconds and when it remains permanently lit, programming has been terminated correctly.
4 Switch off the master switch and disconnect the machine from the mains.
5 Disconnect the programmer.
12 REFRIGERATOR CIRCUIT MAINTENANCE
12. 1 LOCATING GAS LEAKS
The following is the recommended method for the systematic inspection of the refrigerator circuit when trying to identify the source
of a gas leak.
When using the leak detector, always direct the sensor towards the bottom of
the copper tubes. The refrigerant gas is heavier than air.
Where the copper tube is protected by an insulation grip, the leak can be detected from both ends of each individual grip.
Referring to figure 3, proceed as follows:
1 Begin the inspection at the "High Pressure" zone (discharge) of the compressor. Check around the seals.
2 Follow the copper pipes to the condenser and check the sealed connections at the condenser entrance and exit.
3 Also check the curves of the pipes on both sides of the condenser.
4 Follow the copper pipes to the evaporator, checking around the sealed connections on the dehydrator filter and the
&
IMPORTANT
figure 4
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A High pressure (discharge)
B Low pressure (suction)
1 Compressor
2 Condenser
3 Fan
4 Filter
5 Evaporator
6 Accumulator
7 Solenoid valve