Technibel MTF73C5, Technical Data & Service Manual, Page: 10 / 13

7. TROUBLESHOOTING
7-1 The unit does not work
Check the voltage. Are NO Check the unit YES Check the electrical
there 198 ÷ 264 volts ? electrical cable supply line
YES
Check if thermostat NO Check the ambient YES
contact temperature must be Replace the thermostat
is closed (C-2) over 16,5°C
YES
Check if there is voltage NO Check if tank micro -
on the on/off switch (SW1) switch contacts are
(contact is closed 2-4) closed
(1 - 2 MS contacts)
NO
Check if the pilot NO Is the flickering alarm
lamp is burnt. lamp on the control
Eventually replace it panel not visible ?
7-2 Circuit breaker trips when "ON" button is pressed
Check the unit hardness NO Insulate the short
Is it insulated ? circuit cable
YES
Check if the fan motor is NO Replace the fan motor
working (FM) (FM)
YES
Check if compressor relay NO Fir electrical
connections are insulated connections properly
YES
Check if compressor relay YES Replace the compressor
works. Is it in short circuit? relay
NO
Check if compressor YES Replace the
windings are in compressor
short circuit
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