Haier CA0035EAND Service Manual page 42

9.3 Unit Maintenance
Do not take short circuit protection device, it may cause an accident.
1. The main component maintenance
During operation of the exhaust system should pay close attention, suction pressure, such as abnormal timely find
out the reasons, troubleshooting.
Control and protection equipment in the field not to freely adjust the set point.
Periodically check the electrical connections for loose contact point oxidation, caused by foreign objects is bad, if
to be a timely manner. Often pay careful attention to the operating voltage, current and phase balance.
Timely check the electrical device reliability, and failure to respond timely replacement of unreliable devices.
2. Cleaning
After the long run, the water side of heat transfer surface will be deposited calcium oxide or other minerals, these
minerals at higher heat transfer surface fouling, can affect the heat transfer performance and lead to increased
energy consumption, exhaust gas pressure is too high (or suction pressure too low). Cleaning may be an organic
acid as formic acid, citric acid, acetic acid and the like. Never use chlorine acid or fluoride cleaning agents, due to
the water-side heat exchanger material is stainless steel, easy to corrosion, resulting in refrigerant leak.
Clean water side of the heat exchanger shall be professionals. Please contact your local customer service center
haier air conditioning.
After using a cleaning agent, clean water with clean water and a heat exchanger, water treatment system to
prevent water corrosion or scale re-adsorption after cleaning.
In the case of cleaning agents, according to the deposition of dirt adjust the concentration of the cleaning agent,
the cleaning time and temperature, at the same time, after the completion of the associated need for passivation.
After the completion of acid-washed clean, the need for ongoing and waste treatment, waste reprocessing must
contact the waste disposal company for waste processing.
Cleaning agents and neutralizing agent to the eyes, skin, nasal and other corrosive effect, so you must use the
cleaning work protection device (such as goggles, protective gloves, protection shoes, protection mask, etc.) to
avoid inhalation or contact with these agents.
3. Winter shutdown
When the winter shutdown, clean the inside and outside surfaces of the unit, and dry, to dust, the unit should be
covering, playing open valve, put the water in water purification and water-side heat exchanger inside, to prevent
freezing of the accident. The best injection antifreeze in the pipes.
4. Stop the initial start
After any downtime, subject to the following preparations when the unit is started again:
Thorough inspection and cleaning unit
Clean water piping system.
Check the pump, regulator valve and other equipment plumbing system.
Tighten all wire connections.
5. Parts replacement
Haier fitting replacement parts should be used, not just the same as any replacement parts.
6. The refrigeration system
By checking the intake, exhaust pressure value to determine whether the injection refrigerant and leak detection,
leak or replace if
Refrigeration cycle system components tightness test should be carried out, filling the refrigerant in the following
two cases should be treated differently.
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