Contact Us
SCHLEE is committed to building a first-class manufacturing enterprise.
Building the industry-leading brand “SCHLEE,” continuously delivering maximum value to our customers, and contributing to the realization of the nation’s dual-carbon goals!
Nationwide Unified Service Hotline: 400-858-1880
24-hour service hotline: 025-86126119
If you have any questions, please feel free to contact us at any time.
SCHLEE is wholeheartedly at your service—welcome to inquire!
Online Repair Request
Frequently Asked Questions
Does not cool / Poor cooling performance
Check for refrigerant leaks (recharge with the corresponding refrigerant model after repairing the leak), inspect and clean blocked filters/heat exchangers, and address compressor start-up failures (measure voltage/replace damaged electrical components).
Compressor abnormality (unusual noise/overheating/not starting)
Unusual noises are often caused by insufficient lubrication or worn components (add oil/inspect and repair bearings); overheating is due to poor cooling and heat dissipation (clean the condenser) or overload (check current/adjust pressure); if the unit fails to start, check for faults in the power supply, relay, or windings (repair or replace as needed).
Refrigerant leak
Locate the leak using soapy water or a leak detector (repair the joint/valve by welding). After evacuating the system, charge the refrigerant according to standards, ensuring that the amount is neither excessive nor insufficient.
Large chilled water temperature difference
In most cases, insufficient heat exchange in the chilled water system is due to inadequate heat transfer (clean the filter screen/check the chilled water concentration/check the chilled water pump). Frosting on the piping may be caused by a clogged throttling valve (disassemble, clean, or replace it) or insufficient refrigerant (recharge the system).
Abnormal system pressure (too high/too low)
High pressure that is too high indicates poor condensation (clean the condenser/check the fan) or overcharging (recharge to the standard amount); low pressure that is too low indicates a leak (detect and repair the leak) or a clogged filter (replace the filter element).
Service Training
Daily operations
◉ Before powering on, first check the water and electricity supply to ensure that the voltage phase sequence—live, neutral, and ground—are all normal, and that the liquid level and flow rate meet the requirements for unit operation.
◉ After the unit is fully filled with water, first turn on the chilled water pump and run it for 3-5 minutes before starting the unit. When shutting down, first turn off the unit, then turn off the chilled water pump (turn off the pump 20 minutes after the unit has been stopped).
◉ When starting up, press and hold the power button for 3 seconds after the unit’s preheating time reaches 0. The unit will then begin a countdown; when the countdown reaches 0, the unit will start up.
◉ During unit operation, closely monitor the unit’s operational data, including high-pressure and low-pressure readings, compressor capacity levels, inlet and outlet water temperatures, and exhaust gas temperature. When the unit operates at 100% capacity, observe the high- and low-pressure data (the data should be relatively stable; if any abnormalities are detected, report them for repair immediately).
◉ Enter the initial password on the settings page to access the operation settings page and adjust the set temperature.
Unit Structure and Systems
◉ Unit System (primarily using refrigerant): The refrigerant is drawn in from the suction side (low pressure) of the compressor, compressed by the compressor, and then discharged to the discharge side (high pressure). It then flows into the condenser coil. After being cooled down in the condenser coil, the refrigerant passes through a dryer filter before entering the expansion valve. From there, it flows into the evaporator and finally returns to the compressor.
Common faults
◉ If the unit’s fault protection indicator light turns red, you need to check the alarm list to identify the specific fault. For minor faults, resolve them on-site and then restart the unit. For complex faults, please report the issue for repair.
◉ For details on the fault, please refer to the crew assistance page to view common faults. (This information is for reference only; it is recommended to report the issue for repair or have it handled by a professional to avoid causing secondary failures.)
Winter freeze protection
If the unit is not used for an extended period during winter, frost protection measures must be taken.
◉ Close the make-up water valve, open the drain valve, and drain the cooling water.
◉ Close the inlet and outlet valves for chilled water, open the upper and lower plugs on the evaporator, and drain the chilled water.
Complaints and Suggestions
*Note: If you’re interested in our products, please fill out the information carefully to ensure smooth communication. We’ll get in touch with you as soon as possible.
Marketing Center:
Address: 25th Floor, Fuxin International Building, No. 359 Hongwu Road, Nanjing City
Fax: 025-84485651
Production base:
Address: No. 20 Jupu Road, Pukou Economic Development Zone, Nanjing City
Fax: 025-84950547