Analysis and solution of common faults of air-cooled water chiller

The air-cooled chiller plays a critical role in maintaining optimal cooling within the entire system. As an operator, beyond performing routine maintenance and proper operation, it’s essential to identify and address common issues promptly to ensure the chiller functions efficiently. Early detection of potential problems is key to avoiding costly downtime and preserving the longevity of the chiller. 1. Monitoring Operational Parameters: One of the first steps in identifying faults is checking the operating parameters such as high and low-pressure levels of the fluorine gas, oil pressure, and the inlet and outlet pressures of both the cooling water and chilled water. These parameters should align with the operational conditions set for the system. Deviations can indicate underlying issues. For instance, if the compressor suction line shows signs of frosting, this could mean the chiller is overcharged, leading to excessively low evaporation temperatures, which might result in “liquid slugging” in the compressor or vibrations in a centrifugal chiller. 2. Listening for Abnormal Sounds: Pay close attention to the sounds the chiller makes while operating. A well-functioning compressor typically emits a consistent humming noise. If instead, you hear knocking sounds or irregular vibrations, it could signal a liquid strike or mechanical wear. Identifying these sounds early allows for timely intervention. 3. Physical Inspection: Beyond monitoring numbers, physically inspect the chiller. Feel the temperature and vibrations of various components, including the compressor, pipes, and joints. Normally, the compressor should run smoothly with a noticeable temperature difference between intake and exhaust gases. Any deviation from this norm may suggest a problem requiring attention. 4. Comprehensive Analysis: Gather operational data and cross-reference it with the manufacturer's guidelines. This information, combined with observations from listening, touching, and visual checks, helps pinpoint the root cause of issues. Once identified, decide on appropriate corrective actions to resolve the problem efficiently. Troubleshooting Procedures: Addressing chiller malfunctions requires a systematic approach. Avoid disassembling components without understanding the issue thoroughly, as this can worsen existing problems or introduce new ones. If unsure, contacting the manufacturer for professional assistance is advisable. By following these practices, operators can significantly reduce the risk of major breakdowns and maintain the chiller’s performance over time. Regular checks and prompt responses to warning signs are vital for minimizing disruptions and maximizing efficiency.

Monarch Control System

NICE Series - an Integrated Solution for Elevators & Escalators

Monarch's Integrated Solution combines control intelligence & inverter drive in one compact package.
An innovative solution for OEM`s who value reliable state of the art performance at a highly competitive cost.
A NICE new comfortable experience from Monarch.

NICE3000+ Elevator High Performance Integrated Controller
Comprehensive Function Features
Direct-To-Floor
By the principles of distance, automatically generate the smooth curves from start of parking, no crawling and directly stop in the levelling position.

Optimum Velocity Profile Efficiency
The elevator controller will optimise the velocity profile based on the desired travel distance demand instead of floor number.

Advanced Door-Opening
Under the automatic operation state, the speed during stopping is less than 0.1 m/s and the gate signals effective, system shorts door-lock signal through advanced door-opening module and then opens the door ahead of time to enhance the elevator efficiency

Category Door Open Holding Set-Time
System can automatically identify different time to keep the open calls to open the door, instructions to open the door, the door to protect open, delay to open the door and to open the door inaccordance with the setting time.

Re-levelling
This may occur when the lift stops at the floor station, and a large number of persons or goods enter or leaves. The levelling fluctuates because of the elastic deformation of elevator Wire Rope and the rubber. System is allowed to run automatically at the relevelling speed to the levelling station with the door open.

Self-Rescue Levelling
The elevator is in its normal operating state, but doesn`t stop at the correct level. If it meets the safety requirements to run, the lift will automatically run slowly to the nearest floor area, and then open the door.

Emergency Inertia Rescue Mode
Applicable for permanent-magnet synchronous motors only. When there is a power failure, system will short-circuit the motor phases through its contactor and produce a restraining torque when in motion. Based on the elevator inertia, the elevator will slide slowly and controller will open the elevator door when it reaches levelling position.

Emergency Self-Rescue Time-Out Protection
When elevator is at balance load or rescue device power capacity is inadequate. Long rescue time lapse is expected and accident may occur. This function enables the system to self-disable the emergency operation.

Elevator Position Auto Calibration
Each time the elevator enters the terminal floor zone, system will self-calibrate the position counter with respect to the 1st slowdown limit switch so that elevator over travel operation will be eliminated.

Fire Alarm Rescue Function
Enable user to preset the elevator designated homing floor when fireman mode is enabled

Monarch Control System,Lift Control System,Elevator Card Access System,Destination Control System

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