16
3.10.
PAL/CA ALARM
Indicative of activation of digital input 7-8, means that it has been activated 2 times in 20 minutes.
(Parameters Nps = 2 did = 20).
Possible causes:
1-
PR Voltage Protector see "Network Protector States" on page 17-18.
2-Analyze electrically low pressure switch (PB), high pressure switch (PA).
In case PB is open, indicative of stop due to low pressure, causes:
-
Pressure switch error or electrical connection pressure switch.
-
Coolant leak
-
Compressor has started after activation due to cold demand and the liquid solenoid valve has been
closed. Analyze state coil solenoid, connectin connector coil and terminals 20-N
-
Evaporator fan does not work. Analyze fan output on the microprocessor 18-N.
In the display, under the fan symbol, the red dot must be fixed so that the fan output is activated,
this will happen when pb2 reads 2ºC below the FST value, that is, if the origin parameters have
not been manipulated at 6ºC in the LT equipment and 8ºC in the MT equipment.
-
Check that the jumpers (0), make a good connection. Push bridges.
