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10
TROUBLESHOOTING
A light emitting diode (LED) is connected between terminals + and D. In case the
electronic unit records an operational error, the diode will flash a number of times. The
number of flashes depends on what kind of operational error was recorded. Each flash
lasts 1/4 second. After the actual number of flashes there will be a delay with no
flashes, the sequence for each error recording is repeated every 4 seconds. Flashes
will only occur in the fault mode with the system on.
OPERATIONAL ERRORS SHOWN BY LED
Number of
flashes
Error type
5 Thermal cut-out of electronic unit (If the refrigeration system
has been too heavily loaded, or if the ambient temperature is high,
the electronic unit will run too hot).
4 Minimum motor speed error (If the refrigeration system is too
heavily loaded, the motor cannot maintain minimum speed 1,850
rpm).
3 Motor start error (The system is overcharged).
2 Fan over-current cut-out (The fan is defective).
1 Battery protection cut-out (The voltage is outside the cut-out
setting. Low voltage.)