Dryer Maintenance, RNC Dryer, RNC Refrigerated Dryer Digital Controller

DRYER MAINTENANCE

RNC Dryer Start & Stop

Starting and Stopping RNC Dryers with Digi-Pro

/ For RNC up to 350 CFM

RNC Refrigerated Dryer Digital Controller

User Interface: During normal operation the display shows the evaporation temperature.

Showing Machine Status

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

Operation: During normal operation, the digital controller display shows the evaporation temperature.

Menu Buttons

Mode Display Buttons

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.