- PROGRAM
- To modify the parameters, press and release button SET. This should be used by service team.
DRYER MAINTENANCE
RNC Dryer Start & Stop
Starting and Stopping RNC Dryers with Digi-Pro
/ For RNC up to 350 CFM
- To START the dryer: Hold the power button for 5 seconds.
- The dryer active light will flash for 45 seconds before starting the dryer.
- To STOP the dryer: Hold the SET button for 5 seconds. The screen will change from Loc to UNL. Then hold the power button for 5 seconds, this will stop the dryer.
RNC Refrigerated Dryer Digital Controller
User Interface: During normal operation the display shows the evaporation temperature.
Showing Machine Status
- To disable the Key Lock: Press and hold the SET for 4 sec.
- Press and hold button DOWN for 4 sec: the display will show Pb1.
- Press and release button UP or DOWN to select:
- Pb1 heat exchanger probe
- hSE running hours for unit
- rhS reset running hours for unit
- hFI running hours for filter
- rhF reset running hours for filter
- rFI reset filter alarm
- To reset the value, press and release button SET, press and release button UP to set
- 149 for rhF and rFI
- 171 for rhS
- rhS reset running hours for unit
Operation: During normal operation, the digital controller display shows the evaporation temperature.
Menu Buttons
- POWER
- This button is used for starting and stopping the dryer. Press and hold for 4 seconds to start or stop.
- MENU
- These buttons are used to navigate between screens and adjust values.
- MANUAL DRAIN
- This button is used for manual control of the drain output. press and hod for 4 seconds o drain manually.
Mode Display Buttons
- DRYER ACTIVEMODE
- This mark indicates that the dryer is performing in active state and drying.
- AUTOMATIC DRAIN MODE
- Shows if the drain system is activated
- ENERGY SAVING MODE
- Shows if the energy saving mode is activated
- CELSIUS UNIT MODE
- Indicates that Celsius temperature unit is selected
- FAHRENHEIT UNIT MODE
- Indicates that Fahrenheit temperature units selected
- COMPRESSOR STANDBYMODE
- This mode shows that the dryer is ready for drying operation.
- SERVICE MODE
- This mode shows that the dryer reached service time
Alarm Display
Alarms/ warnIngs are displayed on the digital screen. That means the dryers is not working under normal operating conditions, which are outside the range of set values.
| Alarm Code | Alarm Description | Reason for Alarm |
|---|---|---|
| tAL | Low Temperature Alarm | Refrigerant line temperature is lower than specified set values |
| tAH | High Temperature Alarm | Refrigerant line temperature is higher than specified set values |
| FIL | Filter Change Alarm | Filter element needs to be replaced |
| SEr | General Service Alarm | General service time of the dryer |
| HPr | High Pressure Alarm | Refrigerant high line pressure is higher than specified set values |
| Pr1 | Temperature Probe Alarm | Temperature sensor is faulty |
| hF1 | Running Hours Alarm | The dryer running hours allowed has been reached |
Please contact service when an alarm/warning occurs.
Alarms
3.1 Alarm Output
- If a low temperature alarm is running (the display shows the code “tAL”)
- If a high temperature alarm is running (the display shows the code “tAH”)
- If it is required to change the filter (the display shows the code “FIL”)
- If an alarm HP or HPr is running
- If an alarm COH or CSd is running
- If the compressor running hours allowed has been overtaken ( the display shows the code “SEr” and the LED service is lit)
- If the compressor running hours allowed has been overtaken ( the display shows the code “FIL” and the LED service is lit)
3.2 Device / Compressor Running Hours for SEr
Parameter sets to record the device running hours or the compressor running hours. When the running hours overtakes the hours, the display shows the code “SEr” alternated to the temperature read by the heat exchanger, LED service is lit and the device works normally. To show/cancel the compressor running hours have a look at chapter 1 “USER INTERFACE” (labels hSE and rHS).
3.3. Device / Compressor Runtime for FIL
Parameter sets to record the device runtime or the compressor runtime. When the runtime reaches set limit, the display shows the code “FIL” replacing the temperature read by the heat exchanger, service LED is lit and the device works normally. To show/cancel the compressor runtime have a look at chapter 1 “USER INTERFACE” (labels hSE and rHS).
3.4. Input Change Filter
The activation of this input triggers the display showing the code “FIL” alternated to the temperature read by the heat exchanger, LED service is lit and the device works normally. Restoring the normal operation works the same way as cancelling the filter runtime (look for label rFI).
3.5. High Pressure Alarm
During this alarm the compressor is switched off.
3.6. Condenser Fan
- If one output is configured as condenser fan, parameters are relevant, as follows.
- If just one of the input terminal pairs, 11-10 or 9-10, is configured as fan activation, the input activation also activates the output.
- If the input terminal pair 11-10 is configured as condenser probe, the fan will be switched on when the compressor is switched on; as soon as the compressor switches off, the fan keeps on being switched on for the time F1, then it works according to temperature F0 (the fan switches off when the temperature falls below the temperature F0 and switches on when the temperature rises above F0 + 2°C/4°F.
- If the condenser probe is in error, the fan is switched on if the compressor is switched on and is switched off if the compressor is switched off (in this last case the fan is switched off with the delay F1 since the compressor switches off).
- If the input terminal pair 11-10 is configured as condenser fan and the input terminal pair 9-10 is configured as fan activation, input terminal pair 11-10 has priority over the input terminal pair 9-10.
- If no input is configured to manage the fan, this is switched on if the compressor is switched on, and switched off if the compressor is switched off (in this last case the fan is switched off with the delay F1 since the compressor switches off).
- In case of COH and CSd alarm the fan is switched on; the fan LED shows the status of the output.
3.7. Drain Test
Press and hold button UP 4 s: the relay will be turned on as long the button is pressed. When the button is released the valve restores its cyclical operation.
Filter Alarm
To reset the filter alarm, you need to enter the service domain and then access the “rHF” section. Please follow the steps carefully.
Table 1 Steps to reset the filter alarm
Main page
To disable the Key Lock: Press and hold the SET button for 4 sec
Key Lock
“Loc” apperars while holding the SET button for 4 sec
“UnL” appears when key lock is released
To access service menu (Pb1):
Press and hold the menu button for 4 sec.
“Pbl” appears when service menu is opened
To access “rHF”, use the menu keys
Press the SET button to password section after access the “rHF” section.
ENter “149” in the password field
The press and release button SET : the display will show “—” sec flashing
The main page appears after this operation
Reset Service Alarm
Table 1 Steps to reset the filter alarm
Main page
To disable the Key Lock: Press and hold the SET button for 4 sec
Key Lock
“Loc” apperars while holding the SET button for 4 sec
“UnL” appears when key lock is released
To access service menu (Pb1):
Press and hold the menu button for 4 sec.
“Pbl” appears when service menu is opened
To access “rHS”, use the menu keys
Press the SET button to password section after access the “rHF” section.
Enter “171” in the password field
The press and release button SET : the display will show “- – -” sec flashing
The main page appears after this operation
Changing Temperature Units from F/C
To reset the filter alarm, you need to enter the service domain and then access the “rHF” section. Please follow the steps carefully.
Main page
To disable the Key Lock: Press and hold the SET button for 4 sec
Key Lock
“Loc” apperars while holding the SET button for 4 sec
“UnL” appears when key lock is released
To access service menu (Pb1):
Press and hold the menu button for 4 sec.
“PA” appears when service menu is opened
Enter “149” in the password field
After the password is confirmed, it is entered in the definition section.
Make the value “2” to select the unit Fahrenheit, make the value “1”
to select the unit Celcius use the menu keys ().
The press and release button SET: the display will show “- – -” 4
sec flashing.
The main page appears after this operation automatically.
Filter Alarm Parameters
For the filter alarm duration, you need to enter the parameter field and then access the “A9” section. Please follow the steps carefully.
When making these adjustments, be careful of the timing on the controller. The standard timing is 6000 hours. For this, the value that should be entered in A9 is 60. The controller evaluates the entered values by multiplying by 100. For example; 60 x 100 = 6000 h.
Main page
To disable the Key Lock: Press and hold the SET button for 4 sec
Key Lock
“Loc” apperars while holding the SET button for 4 sec
“UnL” appears when key lock is released
To access parameters menu (PA):
Press and hold the menu button for 4 sec.
“PA” appears when service menu is opened
Press the SET key to enter the password.
Enter “10” in the password field, use the menu keys.
After the password is confirmed, it is entered in the definition section.
To access “A9”, use the menu keys ().
Standard filter time appears on the screen. Note! 60 x 100 = 6000h
Press the Set key after entering the new filter time. Use the menu keys.
After the process is complete, you can return to the main menu with the OFF button.
Energy Saving Mode
For the energy saving mode parameters, you need to enter the parameter field and then access the “r1” and “r2” section. Please follow the steps carefully.
“r1” is the initial value of the energy saving mode parameter. After the evaporation value reaches this value “r1”, the dryer goes to stand by. “r1” is the end value of the energy saving mode parameter. When the evaporation value reaches this value, the dryer comes out of the standby and starts to work.
Main page
To disable the Key Lock: Press and hold the SET button for 4 sec
Key Lock
“Loc” apperars while holding the SET button for 4 sec
“UnL” appears when key lock is released
To access parameters menu (PA):
Press and hold the menu button for 4 sec.
“PA” appears when service menu is opened
Enter “10” in the password field, use the menu keys.
After the password is confirmed, it is entered in the definition section.
To access “r1”, use the menu keys ().
Please enter the new value, then press the SET button, use the menu keys.
To access “r2”, use the menu keys ().
Please enter the new value, then press the SET button, use the menu keys.
After the operation is completed, you can return to the main menu with the OFF key.
Drain Time Parameters
For the drain times it is necessary to enter the parameter field and then access the sections “u2” and “u3”. Please follow the steps carefully. Note that when these values are changed, the time of evacuation closed time is in minutes and the time of evacuation opened time is in seconds.
Main page
To disable the Key Lock: Press and hold the SET button for 4 sec
Key Lock
“Loc” apperars while holding the SET button for 4 sec
“UnL” appears when key lock is released
To access parameters menu (PA):
Press and hold the menu button for 4 sec.
“PA” appears when parameter menu is opened.
Press the SET key to enter the password.
Enter “10” in the password field, use the menu keys.
After the password is confirmed, it is entered in the parameter section.
To access “u2”, use the menu keys.
Press the SET button to enter the parameter. Use the menu keys.
This value is the drain system’s on-time.
Standard time is 5 seconds.
Please enter the new time, the press the SET button.
To access “u3”, use the menu keys.
Press the SET button to enter the parameter. Use the menu keys.
This value is the drain system’s off-time.
Standard time is 4 minutes.
Please enter the new time, the press the SET button.
After the operation is completed, you can return to the main menu with the OFF key.
Controller Electrical Connection
EV3B23* and EV3B33* have the same electrical connection; EV3B23 relay K1 is rated 16 A, EV3B33 relay K1 is 30 A.
