What does TH2 failure mean on McQuay Chiller?
A TH2 failure in your McQuay Chiller could mean that the Comp 2 discharge temperature sensor is disconnected. Check the TH2 resistance and replace the sensor if needed. It may also indicate a PCB failure, requiring a PCB replacement.
What to do if my McQuay Chiller shows a high pressure malfunction?
A high-pressure malfunction in your McQuay Chiller can stem from several issues. The motor could be damaged, there might be a short circuit in the air circulation, or the heat exchanger could be dirty. Other potential causes include a dirty refrigerant side filter, excessively high ambient temperature, or too much refrigerant charge. It could also be due to a PCB high-pressure output failure or a voltage switch failure. To resolve this, try the following: * Change the motor. * Improve condenser air circulation. * Clean the condenser. * Check and replace the refrigerant side filter. * Power off the system if the ambient temperature is too high. * Discharge some refrigerant. * Change the PCB or pressure switch if those are the cause.
What causes a low pressure malfunction in McQuay Chiller?
A low-pressure malfunction in your McQuay Chiller may be due to a leakage or lack of refrigerant. Check for any leaks and recharge the system. It could also be caused by a PCB low-pressure output failure, in which case you should replace the PCB. Another possible cause is a faulty low-pressure sensor; if this is the case, replace the pressure sensor switch.
Why is the discharge temperature too high on my McQuay MAC060D4?
If the discharge temperature is too high in your McQuay Chiller, it could be due to motor failure, return air short circuit, or a dirty condenser. Also, it can happen if the EWT is too high, or there is a lack of refrigerant or leakage. To solve this, change the fan motor, improve terminal equipment air circulation, and clean the condenser. If the EWT is too high, reset it by service personnel. If there is a lack of refrigerant or leakage, charge refrigerant.
What causes a pump overload in McQuay MAC060D4 Chiller?
If your McQuay Chiller's pump is overloading, it's possible the pump running current is too high, causing the overload protection to activate. Verify the pump current overload setting is correct according to the wiring diagram. Also, check if the pump resistance is normal.
What does TH12 failure mean on McQuay MAC060D4?
A TH12 failure in your McQuay Chiller may indicate a suction temperature sensor disconnect or short circuit. Check the TH12 resistance and replace if necessary. It could also be due to a PCB failure, requiring you to change the PCB.
What does TH8 failure mean on McQuay Chiller?
A TH8 failure in your McQuay Chiller could be caused by an ambient temperature sensor disconnect or short circuit. Check the TH8 resistance and replace the sensor if needed. It could also be a PCB failure, requiring you to change the PCB.
What does TH10 failure mean on McQuay MAC060D4 Chiller?
A TH10 failure in your McQuay Chiller could be due to a condenser outlet temperature disconnect or short circuit. Check the TH10 resistance and replace if necessary. It might also indicate a PCB failure, in which case you should change the PCB.
What does TH1 failure mean on McQuay Chiller?
A TH1 failure in your McQuay Chiller might indicate a Comp.1 discharge temperature sensor disconnect. Check the TH1 resistance and replace if necessary. It could also be due to a PCB failure, requiring you to change the PCB.
What to do if McQuay MAC060D4 over heats lower than 2 for 5 minutes?
If your McQuay Chiller overheats and remains lower than 2 for 5 minutes, it could be due to a broken low pressure/temperature sensor, requiring a replacement. Another potential cause is EXV failure, which also requires replacing the EXV.
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