44 4. Fault Finding; 44 4.1 High Pressure Switch; 45 4.2 Safety Breaker For Heating Element; 45 4.3 Heat Pump Will Not Run - AO Smith AH-290 Manuel D'installation, Mode D'emploi, Manual D'entretien

4. Fault finding
60
The heat pump is equipped with the following safety devices:
4.1 High-pressure switch
The high-pressure switch protects the heat pump against too high pressure
in the cooling circuit.
In case of interruptions (too high pressure), the red light in the control panel
will flash and the high-pressure switch will stop the heat pump. The red
light lights. Restart the equipment by manually resetting the high-pressure
switch.
For reaching the manually resetting, look between the lamella on the top.
If the aggregate stops more times repeatedly you should call the service.
4.2 Safety breaker for heating element
The safety breaker protects the equipment against overheating during
heating with the electrical cartridge. The safety breaker is mounted on the
heater. If the adjusted value (90°) is exceeded the electrical cartridge will
disconnect. It can be reconnected when the temperature is below 90°. To
do this, the power to the equipment must be off, front door dismantled. The
reset button can now be pressed.
4.3 Heat pump will not run
Please test if:
• the power is connected;
• the power is turned on at the wall plug;
• the heat pump is disconnected through the temperature control;
• the temperature of the sanitary water is less than 55°C;
• the high-pressure switch is disconnected;
• the cooling coil is dirty.
If this does not help locating the error, please contact your local installer or
service contractor.