Check Operation - Daikin VRV III-S RXYMQ36 48PVJU Service Manual

Test Operation

1.1.3 Check Operation

* During check operation, mount front panel to avoid the misjudging.
* Check operation is mandatory for normal unit operation.
(When the check operation is not executed, alarm code "U3" will be displayed.)
Press and hold the TEST
OPERATION button (BS4) on
outdoor unit PCB for 5
seconds.
Check on operation
On completion of test operation, LED on outdoor unit PCB displays the following.
H3P ON: Normal completion
H2P and H3P ON: Abnormal completion →Check the indoor unit remote controller for abnormal display and
Malfunction code
In case of an alarm code displayed on remote controller:
Malfunction
Installation malfunction
code
The shutoff valve of an outdoor unit is left
closed.
E3
Refrigerant overcharge
The shutoff valve of an outdoor unit is left
closed.
E4
Insufficient refrigerant
Refrigerant overcharge
The shutoff valve of an outdoor unit is left
F3
closed.
Insufficient refrigerant
F6 Refrigerant overcharge
U2 Insufficient supply voltage
If a check operation has not been
U3
performed.
U4 No power is supplied to an outdoor unit.
UA If no dedicated indoor unit is being used.
The shutoff valve of an outdoor unit is left
closed.
UF
If the right indoor unit piping and wiring are
not properly connected to the outdoor unit.
If the indoor unit wiring has not be
UH
connected or it has shorted.
56
⎧  The test operation is started automatically.
⎪
The following judgements are conducted within 15 minutes(about 30
minutes at the maximum).
⎪
"Check for wrong wiring"
•
⎪
"Check stop valve for not open"
•
⎪
"Pipe length automatic judgement"
•
⎪
The following indications are conducted while in test operation.
⎪
LED lamp on outdoor unit PCB — H2P flickers (test operation)
•
⎪
Remote controller
•
⎪
⎩
correct it.
Open the gas-side shutoff valve and the liquid-side shutoff valve.
Recalculate the required amount of refrigerant from the piping length
and correct the refrigerant charge level by recovering any excessive
refrigerant with a refrigerant recovery machine.
Open the gas-side shutoff valve and the liquid-side shutoff valve.
Check if the additional refrigerant charge has been finished correctly.
Recalculate the required amount of refrigerant from the piping length
and add an adequate amount of refrigerant.
Recalculate the required amount of refrigerant from the piping length
and correct the refrigerant charge level by recovering any excessive
refrigerant with a refrigerant recovery machine.
Open the gas-side shutoff valve and the liquid-side shutoff valve.
Check if the additional refrigerant charge has been finished correctly.
Recalculate the required amount of refrigerant from the piping length
and add an adequate amount of refrigerant.
Recalculate the required amount of refrigerant from the piping length
and correct the refrigerant charge level by recovering any excessive
refrigerant with a refrigerant recovery machine.
Check to see if the supply voltage is supplied properly.
Perform a check operation.
Turn the power on for the outdoor unit.
Check the indoor unit. If it is not a dedicated unit, replace the indoor
unit.
Open the gas-side shutoff valve and the liquid-side shutoff valve.
Make sure that the right indoor unit piping and wiring are properly
connected to the outdoor unit.
Make sure the indoor unit wiring is correctly attached to terminals
(X2M) F1/F2 (TO IN/D UNIT) on the outdoor unit circuit board.
Indicates "UNDER CENTRALIZED CONTROL"
on upper right.
Indicates "TEST OPERATION" on lower left.
Remedial action
SiUS34-907
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Test Operation