General Disclaimer. The information provided in this support center is intended for knowledge purposes only. When working with HVAC systems, electrical components, or refrigerants, proper safety precautions should always be followed.. Troubleshooting MRCOOL Mini-Split Not Cooling Patrick November 22, 2024 15:26 Updated. If your MRCOOL mini-split isn't cooling as expected, there are several common issues you can address before contacting support. This guide provides a step-by-step approach to troubleshooting, helping you identify and resolve potential problems to restore.
Troubleshooting 5 For other errors: The display board may show a garbled code or a code undefined by the service manual. Ensure that this code is not a temperature reading. Troubleshooting: Test the unit using the remote control. If the unit does not respond to the remote, the indoor PCB requires replacement.. mrcool.com Troubleshooting 5 times OFF EC 53 Outdoor room temperature sensor T4 is in open circuit or has short circuited TS22 5 times OFF EC 52 Condenser coil temperature sensor T3 is in open circuit or has short circuited TS22 5 times OFF EC 54 Compressor discharge temperature sensor TP is in open circuit or has short circuited TS22