Idea ISW-10 SF1-DN1, Installation Manual, Page: 58 / 66

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6.2 CREANING SYSTEM
Parts of the refrigeration system must be inspected monthly to see if the system is functioning properly
and if there are signs of wear. Unit failures usually occur before the device fails or damage, therefore
periodic inspections are the primary means of preventing most system failures. When the refrigeration
system fails, the fault can be judged according to some parameters of the system operation.
6.2.1 PLATE HEAT EXCHANGER
Brazed plate heat exchanger has self-cleaning function thanks to the high-strength turbulence in the
channel of it. However, in some applications fouling is more likely to occur. For example when the water
is hard water with high temperature. In this case, it is necessary to use a circulating flushing device to
clean the heat exchanger. Pump weak acid -- 5% phosphoric acid or 5% oxalic acid (If the heat
exchanger is frequently cleaned) into the heat exchanger and clean it.
Plate cleaning is not included in the company's maintenance, if necessary, you can consult the
company's service personnel.
6.2.2 COMPRESSOR REPLACEMENT
WARNING
When changing the compressor, you must avoid touching the refrigerant and lubricating oil. If touched, it
can cause severe skin burns or frostbite. Long-sleeved gloves must be worn when handling
contaminated parts.
Build-in high efficiency scroll compressor in the system with high reliability. If the construction carry out
strictly in accordance with the correct procedures, the probability of failure during operation is very low.
Compressor motors rarely burn out due to insulation failure. In the events that the motor is indeed burnt
out, most of them were caused by not good mechanical or not good lubrication, namely, high
temperature overheating.
If problems that could cause compressor failure can be detected and corrected early, most compressor
failures can be avoided. Maintenance personnel regularly perform maintenance inspections on
situations in which abnormal operation may occur. Instead of replacing them after a compressor failure,
it is better to take necessary steps to ensure proper system operation. It is not only more easier but also
the cost will be more lower.
When diagnosing the compressor, check that all the electrical components of the compressor are
functioning properly:
1. Check all fuses and circuit breakers;
2. Check the operation of high pressure switches and low pressure switches;
3. If the compressor fails, find out that the compressor failure is caused by electrical faults or mechanical
faults.
6.2.3 MECHANICAL FAULTS
The mechanical failure of the compressor cannot be judged by smelling the burning odor. Try rotating
the motor and if a mechanical fault is confirmed, the compressor must be replaced. If the motor burnt out,
correct the factors that cause the motor to burn out and clean the system. It should be noted that the
compressor motor burnout is usually caused by improper cleaning of the system.