Vitrifrigo MACS Serie Manual página 93

19. Common problems solving guide
Problem
The unit doesn't operate
Fan runs but compressor
doesn't start
Compressor runs
doesn't start
Likely cause
Power supply
Temperature
Power supply
Temperature sensors
Pressure switches get
blocked
Wiring
Compressor
Gas leakage
Compressor run
capacitor
but fan Fan run capacitor
Fan motor
Power supply
Solution
Check voltage at power supply.
Check that the switches on the boat's
electrical panel are not disconnected.
Check the wiring.
Setpoint could be too high (in cooling
mode) or too low (in heating mode). Check
and eventually modify the setpoint value.
Check voltage at power supply.
Check and eventually select the correct
temperature sensor .
Check that temperature sensor has not
fault.
Check for water flow and refrigerant
charge. If everything is ok, then check that
the pressure switches contacts are not
loose or burned, and eventually replace
the pressure switches.
Tug on wires to see if they will separate
from their connections. Replace terminals
if loose or weak.
Check for electrical shorts, ground and
open circuits.
Replace compressor if defective.
Locate leak(s) (oil presence on piping
indicate cracks or damages causing gas
leakage). Replace the correct refrigerant
charge.
Check for electrical shorts. Replace it if
defective.
Check for electrical shorts, ground and
open circuits.
Replace capacitor if defective.
Check for electrical shorts, ground and
open circuits.
Verify the fan motor. Replace if defective.
Check voltage at power supply.
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