DanVex DD Series, User Manual

Page: 27 / 39

Page 27 of 39
5.5 Inspection and maintenance procedures
1. Outer inspection at least once a month
Ensure that the exhaust and fresh air enclosures are not blocked or blocked by leaves, grass or
snow. During winter, it is particularly important not to allow snow to block the tube cover or filter
frost (anti-bird net).
Warning: Outer blockage could induced imbalance.
2. Clean air filter
• Open the access door, allowing the core to slide out, move the filter, and wash with clean water or
mild soapy water. Do not wash in the dishwasher.
Place each filter returns to its original position and slide the core back to the original position.
To ensure safe relocation of machines, please note the following items.
When installing or moving the machine, do not mix anything other than the specific refrigerant in
the refrigerant circuit. Please vacuum all the air inside the tube. If air or other substances are mixed
in, the system pressure will rise and the compressor will burst.
Do not inject refrigerant that is inconsistent or unqualified when installing or moving the machine. If
the refrigerant is inconsistent or unqualified, it may cause problems such as poor operation,
malfunction, mechanical failure, and even major safety accidents.
When relocating or repairing the refrigerant, first perform the cooling operation, and then
completely close the high-pressure side valve (liquid valve). After about 30-40 seconds, completely
close the low-pressure side valve (air valve), immediately stop operation and cut off the
power. Note that the maximum time to close the valve should not exceed 1 minute.
If the time to close the valve is too long, air may be mixed in and the system pressure may increase,
resulting in a compressor burst accident and injury.
When recovering the refrigerant, you must ensure that the liquid and gas valves are completely
closed and the power is turned off before removing the connection pipe.
If the compressor is still running without disconnecting the power supply, and the connecting pipe is
removed when the shut-off valve is opened, air will mix in, causing the system pressure to rise and a
compressor burst accident will cause injury.