XTEMP ENVIRONMENTS (SHANGHAI) CO., LTD.
http://www.xtemp-usa.com/
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DSEO0711-2-V211119/UXP8401-PG.CC.GE.AR-CD7003/5~+45
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Chapter 4 Maintenance
4
4.5
Checking and cleaning of the condenser
The procedures for checking and cleaning of the condenser as follows:
According to the environment conditions for equipment installation, the checking and
cleaning of the condenser is recommended to be made at 3~6 months intervals.
Start the circulating fan and compressor.
Set the operating temperature at 20 °C, while keeping the compressor running and door
opened (to the extent that no door alarm is triggered). This is meant to keep the
compressor working at full capacity.
Check intake and outlet of the air flow from top cover of the machine compartment and
back side of the equipment to feel free air movement.
Keep the compressor running continuously for at least 20 min. Feel the air flow and
temperature at the back of the equipment where exhaust air outlets locate. Strong air
movement and warm or hot temperature mean free heat removal from the condenser.
Whether reduced air intake or heat discharge, it is evidence of blocked condenser or
stalled axial fan(s).
Stop the equipment and remove the mains plug from the power socket. Remove the top
cover of the machine compartment.
Use vacuum cleaner and followed by compressed dried air to clean the condenser. Make
sure not to have any residual dust left in any electric, electronic or refrigerating parts and
components.
Replace the axial fan if any fault or damage and where necessary.
Replace the top cover and fasten the screws as were removed.
4.6
Checking and charging of refrigerant
The procedures for checking and charging of the refrigerant as follows:
Follow steps as for the checking and cleaning of condenser (4.5). Feel the air flow and
temperature at the back of the equipment where exhaust air outlets locate. Strong air
movement but mild or cold temperature mean possible leakage of the refrigerant.
Stop the equipment and remove the mains plug from the power socket. Remove the top
cover of the machine compartment.
Use a compound pressure gauge or equivalent, with hosing for charging of refrigerant and
connection to the compressor. Connect the hosing of low pressure to the suction side of
the compressor, and check for pressure.
