SiBE18-821_C Test Operation
Test Operation and Field Settings 127
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
" is displayed.)
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 error code
display and correct it.
Check on operation
Press and hold the TEST
OPERATION button (BS4) on
outdoor unit PCB for 5
seconds.
{ The test operation is started automatically.
The following judgments are conducted within 15 minutes (about 30
minutes at the maximum).
• “Check for wrong wiring”
• “Check stop valve for not open”
The following indications are conducted while in test operation.
• LED on outdoor unit PCB — H2P Blinks (test operation)
• Remote controller Indicates “ ” (during centralized control) on
upper right.
Indicates “ ” (test operation) on lower left
(Only for SkyAir)
(R12943)
Error code Nonconformity during installation Remedial action
E3
The stop valve of the outdoor unit is left
closed.
Open the gas-side stop valve and the liquid-side stop valve.
Refrigerant overcharged
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.
E4
The stop valve of the outdoor unit is left
closed.
Open the gas-side stop valve and the liquid-side stop valve.
Refrigerant shortage
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.
F3
Refrigerant overcharged
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.
The stop valve of the outdoor unit is left
closed.
Open the gas-side stop valve and the liquid-side stop valve.
Refrigerant shortage
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.
F6
Refrigerant overcharged
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.
U2
Insufficient supply voltage Check to see if the supply voltage is supplied properly.
U3
If a check operation has not been
performed.
Perform a check operation.
U4
No power is supplied to the outdoor unit. Turn the power on for the outdoor unit.
UA
If no dedicated indoor unit is being used.
Check the indoor unit. If it is not a dedicated unit, replace the
indoor unit.
UF
The stop valve of the outdoor unit is left
closed.
Open the gas-side stop valve and the liquid-side stop valve.
If the right indoor unit piping and wiring are
not properly connected to the outdoor unit.
Make sure that the right indoor unit piping and wiring are properly
connected to the outdoor unit.
UH
If the interunit wiring has not be connected
or it has shorted.
Make sure the interunit wiring is correctly attached to terminals
(X2M) F1/F2 (TO IN/D UNIT) on the outdoor unit circuit board.
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