Friedrich AS - W126BMS0, Service Manual

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Part 3 Test Run
Is cold air discharged for
more than 3 minutes ?
START
Test operation for indoor unit
Operation mode change
to Heating mode
Operate the unit in cooling mode.
Does Test operation start?
Refer to part4, 6 Electric part
Yes
No
Yes Refer to part4, 5 Cycle part
No
Is hot air discharged ?
After Hot Start
NOTE: When outdoor temperature is low,the unit is operated to Heating mode
Yes
No
Is there any temperature
difference between intake and
discharged air?
Yes
No
Is the operating current
normal ?
Yes
Normal
Refer to Troubleshooting
Guide
No
* Check the load (In/Out Temp.)
* Check pipe length and amount of
refrigerant
* Check for abnormal sound in
outdoor unit (comp.,Fan, others )
2. Test Run Flow chart