Daikin REYQ72 Serveice Manual page 87

Test Operation
Malfunction code
In case of an alarm code displayed on remote controller:
Cause of trouble due to faulty
installation work
Closed stop valve of outdoor unit
Reversed phase in power cable
connection for outdoor unit
Electric power for outdoor or indoor unit
is not supplied. (Including open phase)
Incorrect wiring between units
Refrigerant overcharge
Insufficient refrigerant
1.1.4 Confirmation on Normal Operation
•
•
•
•
76
Alarm
code
E3
E4
F3
UF
U1
U4
UF
E3
F6
UF
E4
F3
Conduct normal unit operation after the check operation has been completed.
(When outdoor air temperature is 75°F or higher, the unit can not be operated with heating
mode. See the instruction manual attached.)
Confirm that the indoor/outdoor units can be operated normally.
(When an abnormal noise due to liquid compression by the compressor can be heard, stop
the unit immediately, and turn on the crankcase heater to heat up it sufficiently, then start
operation again.)
Operate indoor unit one by one to check that the corresponding outdoor unit operates.
Confirm that the indoor unit discharges cold air (or warm air).
Operate the air direction control button and flow rate control button to check the function of
the devices.
Countermeasure
Liquid side stop valve : Open
Gas side stop valve : Open
Oil equalizing pipe stop valve : Close
Liquid side stop valve : Open
Gas side stop valve : Open
Oil equalizing pipe stop valve : Open
Change connection of two wires among three for correct phasing.
Check that the power cable for outdoor unit is connected properly.
Check that the wiring between units corresponds correctly to
refrigerant piping system.
Compute again optimum amount of refrigerant to be added based on
the piping length, then, collect the excessive amount by using
refrigerant collector to make the refrigerant amount proper.
- Check that additional charging has been carried out.
- Compute again the refrigerant amount to be added based on the
piping length, and charge proper amount of refrigerant additionally.
SiUS39-602
Test Operation