To Next PageTo Next PageWhy is the air side heat exchanger in my Midea Chiller excessively frosted?
Excessive frost on the air side heat exchanger can be due to a faulty 4-way valve or thermal resistor (check and replace if needed) or an air loop short-circuit (resolve the short-circuit).
How to fix over low air discharge pressure in Midea MGB-F30W/RN1 (Heating operation)?
Low air discharge pressure during heating may be caused by low chilling water temperature (check it) or refrigerant leakage or insufficient refrigerant volume (test for leaks and recharge). If the air suction pressure is too low, see the section on “Excessive low air suction pressure”.
What to do if my Midea MGB-F30W/RN1 compressor can’t start?
If the compressor won't start, check for a tripped overcurrent relay or burnt fuse (replace), power to the control circuit (check wiring), high or low voltage protection (refer to air suction and discharge pressure error sections), burnt contactor coils (replace), incorrect phase sequence (reconnect any two of the three phases), water system error or shorted flow-type volume controller (check water system), or error signals from the wire controller (identify and address the error).
What to do if my Midea MGB-F30W/RN1 Chiller compressor stops because of integrate temperature sensor or air discharge temperature protection?
If the compressor stops due to the integrated temperature sensor or air discharge temperature protection, check for high or low voltage (ensure it's within 20V of the rated voltage), high air expelling pressure or low air suction pressure (refer to those sections), or a component error (check the integrated temperature sensor after the motor cools down).
What causes over low air suction pressure in Midea MGB-F30W/RN1 Chiller (Heating operation)?
Low air suction pressure during heating can result from insufficient refrigerant (charge the system), insufficient air flow (check fan direction), an air loop short-circuit (remove the short-circuit), or insufficient frost-removal (replace the 4-way valve or thermal resistor if necessary).
What could cause abnormal noise from the compressor in my Midea Chiller?
Abnormal compressor noise can be due to liquid refrigerant entering the compressor from the evaporator, causing liquid slugging (adjust refrigerant charge), or the compressor aging (replace the compressor).
Lists various safety features and protection mechanisms integrated into the chiller system.
Provides the main electrical wiring schematic for the chiller units.
Lists electrical characteristics like voltage, current, and power for various models.
Presents cooling and heating capacity data for MGB-F(D)25W/RN1 models.
Provides cooling and heating capacity data for MGB-F(D)30W/RN1 models.
Lists cooling and heating capacity data for MGB-F55W/RN1 models.
Provides cooling and heating capacity data for MGB-F60W/RN1 models.
Lists cooling and heating capacity data for MGB-F65W/RN1 and MGB-D65W/RN1 models.
Presents cooling and heating capacity data for MGB-F130W/RN1 models.
Provides cooling and heating capacity data for MGB-F185W/RN1 models.
Lists cooling and heating capacity data for MGBT-F250W/RN1 models.
Lists common fault and protection codes for various chiller modules.
Provides common operational troubles, their possible reasons, and solutions.
Outlines the general steps and requirements for installing the chiller unit.
Covers the process of connecting the chiller to the water system.
Covers the process of selecting and installing the system's pumps.
Outlines general wiring installation guidelines and essential safety precautions.
Provides step-by-step instructions for completing electrical wiring connections.
Details the necessary preparations before initiating the unit's commissioning process.
Explains the steps involved in conducting a successful test run of the unit.
General maintenance instructions for key chiller components.
Details checks and procedures for the refrigeration system, including leak detection.
Necessary measures to prevent freezing within the water system.
Overview and description of the chiller's printed circuit boards.
Explains system faults and protection mechanisms.
Instructions for operating the wired controller and its functions.
Provides temperature-resistance data for pipe temperature sensors.
Lists temperature-resistance data for digital compressor discharge sensors.
General