Service manual

25
9-2- 1 Negative Phase
9-2-2 Discharge Temperature Rise
9-1 Overview
9.0 Troubleshooting
The following flow diagrams show the procedures to repair the typical failures. If the alarm is on and
the compressor is stopped, do not restart the operation until the cause is clearly addressed and
eliminated. Always turn the main power off, and remove the pressure from the compressor prior to a
repair and maintenance.
9-2 Flow Diagram for Troubleshooting
Negative-phase
operation
Poor connection
to power supply
Convert the phase for two of three
main power lines.
Abnormal noise
Start-Up
Request a service
Yes
No
After eliminating the
cause
Discharge temperature rise
Lamp on “high Temp”
Start-Up
Request a service
Check the
controller
- Check lamp on alarm
- Check the input/out of the
temperature sensor
- Replace the temperature sensor, if
necessary
Yes
High ambient
temperature
- Keep the internal temperature 40°C
or below
- Check the ventilation facility and
duct
Yes
No
No
After eliminating the cause
TROUBLESHOOTING