1、 Maintenance content of the electrical part of the refrigeration unit system

1. Check if the pile head of the air switch has changed color again. If so, measure the contact resistance of some switches. If the resistance value is less than 1 Ω, it indicates that there may be a problem with the air switch and it needs to be repaired or replaced in a timely manner.

2. If the hair or hammer head on the contact surface of the contact falls off, immediately change the state of the contact, level it with a file or replace the contact directly.

If there is a lighter on the relay small pile head, the relay must be replaced immediately.

If the insulation resistance of the motor is less than 1 megohm, the insulation paint must be replaced.

2、 The main content of regular self inspection of refrigeration equipment

1. Check whether the evaporator chassis is loose or vibrating, promptly identify the cause and make corresponding adjustments.

2. Carefully listen for any abnormal sounds from the evaporator during operation and repair it promptly.

3. Check if the wiring of the evaporator is burnt black and smell it with your nose.

4. Check if the condensate pipe is leaking.

5. Check if there is oil contamination on the water pan of the evaporator.

3、 The content and steps of the installation of the refrigeration cabinet project

1. The content and steps of motor maintenance

The main problems with motors include: open circuit of windings, grounding of windings, phase to phase short circuits, and bearing damage caused by jamming. Below is an introduction for everyone.

① The method to solve the problem of bearing jamming: remove the motor housing and replace the damaged bearing;

② Repair of motor winding breakage: First, use a multimeter to check the three-phase resistance. If there is only one phase resistance, it indicates that the winding is broken;

③ Maintenance of motor winding grounding: If only one set of three-phase resistors is the same as the casing, it indicates that the winding is grounded and needs to be promptly addressed

2. Maintenance content and steps for refrigeration machine filters

If it is an internal problem of the refrigeration unit manufacturer's system, it is mostly due to inadequate cleaning work, a large amount of dirt is not cleaned in time, and then gradually accumulates at the filter screen, causing the filter screen to become clogged. At this point, it will directly lead to a decrease in refrigerant flow in the refrigeration system, resulting in insufficient refrigeration capacity;

At this point, what we need to do is to promptly remove the filter and clean it. If the filter element is damaged, it needs to be replaced in a timely manner.