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Actions at the time of Failure
When a component failure or malfunction is found, request the specialty company to repair.
Actions at the time of Failure
When the refrigeration unit or any refrigerant circuit component fails to operate by some reason, shut off the power for a
repair. To avoid failure recurrence, use caution for the following.
(1) To avoid recurrence of the same failure, execute reliable failure diagnosis and identify the true cause before starting
a repair.
When a ground fault interrupter is activated, check insulation of the equipment and electrical circuit, eliminate the
cause, and then supply power gain.
(2) When the piping is to be corrected, be sure to release refrigerant from the welded point, and perform welding while
flowing nitrogen gas.
(3) When replacing the major component such as compressor, gas cooler, or refrigerant and refrigeration oil, make sure
to replace the filter dryer.
When the refrigerant circuit is contaminated by burnt compressor motor, etc., apply nitrogen blow to eliminate
refrigeration oil remaining in the refrigerant circuit.
Note: At such time, also remove the expansion valve (electronic expansion valve).
(4) When replacing the compressor, do not apply power to the crankcase heater while it is removed from the compressor.
Be sure to shut off the power. (It may lead to fire)
(5) To avoid current leak accident, install the components (cover, electric parts, etc.) removed during inspection and
service and attach them as they were originally.
(6) When replacing the fuse, be sure to use the company-specified fuse with silica sand.
Note: Commercial product may rupture when the fuse blows out.
(7) When the digital display (LED) on the control PCB does not operate with the power supplied, check the following.
Make sure to check after shutting off the power.
Caution
Operation circuit fuse (5A) has been
blown off ?
Refer to the "Failure Diagnosis of the Control PCB (Self-diagnosis)"
in the "Failure Diagnosis".
Note: When the failure cause is unknown, contact our service office with the failure symptom, model number,
manufacturing code, etc.
NO
YES
Supply power after replacing the fuse.
Note: Use the fuse specified by our company.
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