Tech Controllers ST-53.4 User Manual page 42

8 TECHNICAL DATA
Power supply
Maximum power consumption
Ambient temperature
Compressor max. output load
Fan max. output load
Pump max. output load
Heater max. output load
KTY sensor thermal resistance
THE MANUFACTURER RESERVES THE RIGHT TO CHANGE THE TECHNICAL DATA.
9 MAINTENANCE
Before and during the heating season the ST-53.4 controller should be checked for the condition of its cables. You should also
check if the controller is properly mounted and clean it if dusty or dirty.
10 PROTECIONS
Alarm
High pressure switch error
Low pressure switch error
Control temperature too high
Titanium anode error
Defrost failure
Additional sensor alarm
Control sensor alarm (compressor)
Tank sensor alarm
External sensor alarm
Evaporator sensor alarm
Installation alarm
Possible cause
- Too high pressure in the system
- Pressure switch damaged
- Too low pressure in the system
- Pressure switch damaged
Too high temperature of compressed
gas
- Anode is not connected or connected
improperly
- Anode damage
Failure in compressor system
- Sensor short circuit
- Sensor damaged
Too high or too low pressure in the
system
42
230V ±10% /50Hz
9W
5÷50°C
1.1A
0.6A
0.5A
2A
-30÷99°C
Solution
- Check if the pressure switch is
connected properly
- Wait until the pressure in the system
stabilize
- Call the service
- Call the service
- Call the service
- Try again
- Call the service
- Check if the sensor is connected
properly
- Put the sensor in a different place
- Check if the wire has not been
damaged
- Check the sensor resistance
- Replace the sensor
- The alarm will turn off after a power
reset.