Johnson AURUM R32 M Serie Guide D'utilisation page 163

Transducer module
temperature too high
protection
Low DC generatrix voltage
protection
PED PCB failure
1. Power supply voltage of the unit is low, increase the power
voltage to the required range.
2. The space between the units is too narrow for heat
exchange. Increase the space between the units.
3. Heat exchanger is dirty or something is block on the surface.
Clean the heat exchanger or remove the obstruction.
4. Fan is not running. Fan motor or fan is broken, Change a new
fan or fan motor.
5. Water flow rate is low, there is air in system, or pump head is
not enough. Release the air and reselect the pump.
6. Water outlet temp. sensor is loosen or broken, reconnect it or
change a new one.
1. Check the power supply.
2. If the power supply is OK,and check if LED light is OK, check
the voltage PN, if it is 380V, the problem usually comes from the
main board. And if the light is OFF, disconnect the power, check
the IGBT, check those dioxides, if the voltage is not correct, the
inverter board is damaged, change it.
3. And if those IGBT are OK, which means the inverter board is
OK, power from rectifier bridge is not correct, check the bridge.
(Same method as IGBT, disconnect the power, check those
dioxides are damaged or not).
4. Usually if F1 exist when compressor start, the possible
reason is main board. If F1 exist when fan start, it may be
because of inverter board.
1. After 5 minutes of power-off interval, power on again and
observe whether it can be recovered;
2. If it can't be restored, replace PED safety plate, power on
again, and observe whether it can be restored;
3. If it can not be recovered, the IPM module board should
be replaced.
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