Is cold water discharged for
more than 3 minutes ?
START
Operation mode change
to Heating mode
Operate the unit in heating mode.
Does Test operation start?
Check whether the power cable and
communication cable are completely connected
Yes
No
Yes
No
Is hot water discharged ?
Yes
No
Is there any temperature
difference between intake and
discharged water?
No
Yes
Normal
* Check the load (In/Out Temp.)
* Check pipe length and amount of
refrigerant
* Check for abnormal sound in
* Refer to Troubleshooting Guide
outdoor unit (comp.,Fan, others )
Test run flow chart
Check Points, Maintenance and Troubleshooting
62 Air-to-Water Heat Pump
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