OMEGA AIR RDP 20-1900 Manuals

Troubleshooting Refrigeration Dryer Series RDP 20 - 1900 1 Troubleshooting Troubleshooting and maintenance procedures can only be performed by qualified personnel with the necessary knowledge. Before any maintenance or service parts make sure that: - no part or device is powered and must not be connected to a power source - that no part or device is under pressure and must not be connected to a compressed air system under pressure, - that the maintenance staff fully and accurately read the operating instructions, and in particular the chapters relating to safety at work. SYMPTOM POSSIBLE CAUSE - PROPOSED COURSE OF ACTION None of the LED lights on the controller are on *controller ● Make sure that the system is connected to a power source. ● Check the electrical installation (internal and external). ● Check that the circuit board is not damaged. The TEST button is pressed, but the condensate is not drained *condensate drain ● The service valve in front of the drain is closed - open it. ● The dryer is not pressurized - set normal operating conditions. ● The solenoid valve is defective - replace the condensate separator. ● The circuit board is damaged - replace the condensate drain. Condensate is only drained when the TEST button is pressed. *condensate drain ● The capacitive sensor is dirty - open the condensate separator and clean the plastic tube of the sensor. The spout blows out air. *condensate drain ● The electromagnetic valve diaphragm is dirty - open the drain and clean it. ● The capacitive sensor is dirty - open the condensate separator and clean the plastic tube of the sensor. The drain is in a state of alarm/doesn’t work at all. *condensate drain ● The capacitive sensor is dirty - open the condensate separator and clean the plastic tube of the sensor. ● The service valve in front of the drain is closed - open it. ● The dryer is not pressurized - set normal operating conditions. ● The solenoid valve is defective - replace the condensate separator. ● if the controller was replaced, it may be necessary to change the controller parameters (parameter “2” to be set on value “0”) – see section 2.3 Errors “Pf1”, “Pf2”, ”Pf3” are shown on controller *controller *sensor ● Pf1 - dew point sensor ● Pf2 - compressor sensor ● Pf3 - condenser sensor ● A sensor is missing or is badly/incorrectly installed – check the sensor wiring on the controller ● The controller is faulty/not working properly – the controller has to be replaced Error “Lt” is shown on controller *controller * sensor ● Lt error occurs when dew point temperature value drops below -2°C ● Bypass valve is not set properly – unscrew the protection cap and tighten the nub in a counter clockwise fashion for 1 full turn (360°), wait if dew point values are raising, if not repeat process ● May occur if the ambient temperature is to low Error “Cln” is shown on controller *controller * sensor ● Cln error occurs when the temperature on the condenser surpasses 70°C ● May occur if the ambient temperature is too high ● May occur if condenser coil is dirty – please clean the condenser coil. ● May occur if the fan is not working (there is no ambient airflow through the dryer) - please check the electrical wiring of the fan. ● May occur if there is a bad connection of temperature sensor Ntc. Cond. to the controller – check if the connection of condenser temperature sensor is good. Error ”Ht” is shown on controller *controller *sensor ● Ht error occurs when the temperature of compressor surpasses 110°C ● Check the copper tubing for any leakage – there may very well be a leakage and the temperature goes above 110°C due to insufficient coolant in the system High dew point temperature shown on controller (E.g. >5°C) *controller *sensor *bypass *copper tubing ● Check if sensor is installed correctly (placed in the insulated tubing on evaporator inlet) – adjust the placement of sensor if needed ● Bypass valve is not set properly – unscrew the protection cap and tighten the nub in a clockwise fashion for 1 full turn (360°), wait if dew point values are lowering, if not repeat process ● There could be a leakage of coolant in the system – of possible check the pressure of the dryer on service valves ● May occur if the ambient temperature is too high Fan on condenser does not work *fan *controller ● Check the electrical wiring of the fan ● Check the output voltage for fan on the controller ● Check the working of the fan itself (connect it to an external power supply) Dryer does not start *controller *sensor *bypass *copper tubing ● Check the electrical installation (internal and external). ● Check if the controller is malfunctioning (E.g. is there output voltage on the controller pins after start up time has elapsed) ● Check if there are not safety switches (high and low pressure) active (this applies for first dryer start after it has been installed) ● If the dryer is 3 phase powered, check if the phase sequence is correct ● There could be leakage of coolant in the system – of possible check the pressure of the dryer on service valves * part/category with issue NOTE: When the condensate drain is in alarm condition, the solenoid valve will open every 7 minutes for 7.5 seconds 2 Controller RDC 2 At startup, the controller shows the time remaining until compressors starts by displaying COMP TIME X MIN. The value X can be changed by changing the parameter no. 5. After the countdown is finished, the controller RDC 2 shows the temperature of the dew point reached by the refrigeration air dryer in the normal operation. By pressing the UP (▲) button, the outlet temperature of the compressor is displayed. By pressing the DOWN (▼) button, the condensation temperature is displayed (the temperature sensor is connected) or the condensation pressure is displayed (the pressure sensor is connected). In case of fault, an alarm will appear on the display. The alarm automatically turns off when the dryer is restarted and is operating properly. a) Sensors used for regulation: 1) Tdew = Dew point temperature 2) Tcomp = Compressor temperature 3) Tcond ali pcond = Condensation temperature or pressure (4-20 mA) b) Regulated components: 1) Fan (ON/OFF) • Fan symbol is displayed when in ON state 2) Compressor (ON/OFF) • Compressor symbol is displayed when in ON state 3) Drain (ON/OFF) • Drain symbol is displayed when in ON state c) Operation of fan and compressor 1) Normal operation: • The compressor is always running • The fan is regulated based on measured condensation temperature or pressure • Dew point temperature is displayed. 2) Alarm operation • In alarm state the normal operation is overridden. • If more alarms are activated the last one activated has priority with display and fan/compressor operation. All other active alarms have to be resolved before continuing in normal operation. • Alarm is displayed.