Daikin GQI-Eco Series Service Manual page 124

Symptom-based Troubleshooting
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Is this first starting
after installation?
NO
Is the unit in defrost mode?
NO
Measure the temperature of suction
air and discharge air. Temperature
difference = Suction air temp. –
Discharge air temp.
Temperature
difference for heating should be
between 14 and 30˚C.
NO
Is the
operation current less than
specified level?
NO
Does indoor unit
airflow rate down?
NO
Is the level
of high pressure lower than
normal level?
NO
* Insufficient compression of
compressor
* Insufficient circulation of refrigerant
* Faulty electronic expansion valve
*: Refer to "Test Operation" on P.58.
110
YES
YES
Does the
YES
heat load increase after
installation of the unit?
NO
* Incorrect selection of model
* Affection of sunlight
* Affection of excessive fresh air into
room
YES
Refrigerant shortage possibly
generates trouble.
* Clogged air filter
YES * Soiled heat exchanger
* Defective indoor fan motor (Refer to
A6
troubleshooting "
* Refrigerant overcharge
* Soiled heat exchanger
YES * Short circuit of discharge air
* Disturbing item in airflow
* Defective fan motor of outdoor unit
(Refer to troubleshooting "
This is normal. Heating
operation will be conducted after
2 or 3 minutes (∗).
Wait for a while.
No abnormality
YES
No abnormality
Additional unit installation
should be considered.
After vacuum drying, charge
correct amount of refrigerant.
Check the each item.
")
Check the each item.
E7
".)
Check the each item.
ESIE15-13B
Service Diagnosis