15 TROUBLESHOOTING
Alarm reset: turn the unit off and on again.
NOTE
Before resetting an alarm, identify and remove the cause
generating that.
Repeated resets can cause irreversible damage.
Master unit
If the Master unit’s power supply is disconnected, all of the
group's units stop.
The unit is in protection in the following conditions:
High pressure or protection due to drain temperature
low voltage
compressor current protection
frequency protection of the inverter compressor
condenser high temperature
high temperature difference between the input and output
water
antifreeze protection
drain temperature sensor malfunction
low evaporator temperature
frequency protection by voltage
compressor inverter malfunction
fan motor protection
water return high temperature, in cooling
low pressure antifreeze protection
high temperature of inverter compressor module
When the unit fails or is in protection, the water pump continues
working (except for water flow alarm, voltage protection, phase
sequence protection).
When the master unit is in protection, only the master unit stops
and the other units carry on working.
When a slave unit is in protection, this unit stops and the other
units are not involved.
If the master unit fails, the slave units also stop working.
Temperature sensors
All temperature sensors are classed as faulty when the voltage
on the corresponding input is lower than 0.05 V or higher than
4.95 V.
After an error has been signalled, all units stop. The error is
eliminated after the sensor has been restored.