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Related Manuals for Sub-Zero CRC-2020
Summary of Contents for Sub-Zero CRC-2020
- Page 1 CRC-2020...
- Page 2 Under load limit for compressor current. Instruction manual for VMRC-10/3 21-28 C-OL Over load limit for compressor current. Suggested Wiring Diagram Current sensing delay. Caution & Warranty 30-31 To enable or Disable HP sensing. To enable or disable LP sensing. Fault sensing logic. CRC-2020 CRC-2020...
- Page 3 Introduction Get to Know Your Controller The CRC-2020 is single set point cold room controller. The Sub-Zero CRC-2020 is aesthetically superior versions of their predecessors. CRC-2020 Features: The controller controls the defrost in the system based on time based where the compressor is stopped. It is also possible to select the interval between defrosts and a maximum time out after which the defrost is interrupted.
- Page 4 LP fault. Used to enter into the Amp. mode where compressor current can be viewed. AUX / CTH Auxiliary fault / Compressor Thermal Fault . Used to switch OFF/ON the light. Door Open fault. Oil Pressure Switch Fault. CRC-2020 CRC-2020...
- Page 5 P3+0.5ºC P2-0.5ºC 0.0ºC To set other parameter Press & hold PRG key for Display will show ‘P2’ and scroll the 2 seconds description of the parameter. To go to other parameters, use UP / DOWN keys. CRC-2020 CRC-2020...
- Page 6 Example : If this parameter is set at 3 1 Min 20 Min 3 Min minutes, the compressor will cut off at the set temperature, but will not restart for a minimum of 3 minutes, even if the differential is achieved earlier. This CRC-2020 CRC-2020...
- Page 7 Also display will Example : If P9 parameter is 30 mins flash ‘C-UL’. Controller will go in manual 0 Min 99 Min 30 Min then at power after 30 mins defrosting will reset mode. take place once. CRC-2020 CRC-2020...
- Page 8 Setting this parameter to disable will Fact. Set ignore HP fault for compressor. If this when it present continuously for 30 Secs. Fact. Set parameter is set to Enable then controller 0 Sec 180 Sec 30 Sec will detect HP trip. CRC-2020 CRC-2020...
- Page 9 DIS : OPS I/P is disabled. Fact. Set press the SET key. value. Range Range TEMP : At defrosting temperature Fact. Set will be dispalyed. Fact. Set DEFR : At Defrosting 'Defrost ON' TEMP DEFR TEMP will scroll. CRC-2020 CRC-2020...
- Page 10 If press foe 2 seconds controller will go in Fact. Set Fact. Set stand by state. if press for 2 seconds controller will go in stand by mode, display will be as per “PDIS” parameter. To again switch to ACTIVE WORKING CRC-2020 CRC-2020...
- Page 11 SET key. and displays the Room Temperature and Buzzer : Internal all settings are recorded. RS485 Connectivity : Modbus RTU Protocol Baud Rate : 9600 Device ID : 1 (By Default) CRC-2020 CRC-2020...
- Page 12 Introduction Instruction Manual VMRC-10/3 is three phase Line voltage monitor (LVM) used to protect device LVM (Line Voltage Monitor) Three Phase VMRC-10/3 from Single Phasing, voltage unbalance, phase reversal and under/over voltage. It shows real time voltages between phase and neutral. Index Index There is an Output of alaram relay is given to the controller as SPPR input.
- Page 13 Description of parameters and functions. Description of parameters and functions. Parameter Parameter setting method Parameter Parameter setting method Function : To set Undervoltage Limits. To set other parameter Parameter Press & hold PRG key for Display will show ‘rEF’ and scroll the To change the uV parameter, Use UP/DOWN keys to set desired value.
- Page 14 Description of parameters and functions. Description of parameters and functions. Parameter Parameter setting method Parameter Parameter setting method Function : To set calibration of voltage Function : To set fault recover delay. Parameter Parameter for r-b or b-n phase. To change the Crb parameter, Use UP/DOWN keys to set desired To change the tdr parameter, Use UP/DOWN keys to set desired...
- Page 15 Description of parameters and functions. Technical Data Parameter Parameter setting method Main Functions : Voltage Monitoring. Phase Sequence Monitoring. Function :To end programming. Phase Loss and Phase Unbalance detection. Parameter Uv and Ov Detection. Settable Uv and Ov Parameter. To change the end parameter, Once the set key is pressed, the controller Dimensions : Front : 69.3mm X 44.3mm,...
- Page 17 This warranty is in lieu of any other warranty expressed or implied. In no event shall the company be held liable for incidental or consequential damages, such as lost revenue or lost business opportunity arising from the purchase of this product. CRC-2020 CRC-2020...
- Page 18 OUR OTHER PRODUCTS INDIA Cold Room Controller Chiller Controller Two Compressors Controller Heating Controller Humidity Controller Pressure Controller Ball Valves Globe Valves Hand Valves Flow Switches Solenoid Valves 08 / 19.02.2020...
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Questions and answers
C-ul error how can fix this
A C-UL error on a Sub-Zero CRC-2020 indicates an underload fault for the compressor. To fix this error:
1. Check the Compressor Current – Ensure the compressor is drawing sufficient current. If the current is below the C-UL parameter setting, the error will occur.
2. Adjust the C-UL Parameter – Follow these steps:
- Press the SET key.
- Use the UP/DOWN keys to adjust the C-UL value.
- Set a suitable value based on system requirements.
- Confirm the setting.
3. Verify Wiring and Connections – Ensure there are no loose or damaged electrical connections affecting the compressor's performance.
4. Monitor the System – If the compressor continues to draw low current after three retries within an hour, the system will shut down.
5. Inspect for Mechanical Issues – Check for refrigerant levels, compressor health, or any blockages that could cause low load conditions.
If the issue persists, further diagnosis of the compressor and related components may be required.
This answer is automatically generated