Test Operation
SiUS28-902_B
44
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.)
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 correct it.
Error code
In case of an error code displayed on remote controller:
Check on operation
⎫
⎪
⎪
⎪
⎪
⎪
⎪
⎪
⎪
⎪
⎭
⎧
⎪
⎪
⎪
⎪
⎪
⎪
⎪
⎪
⎪
⎩
Press and hold the TEST
button (BS4) on outdoor unit
PCB for 5 seconds.
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”
• “Check for refrigerant charge”
• “Pipe length automatic judgement”
The following indications are conducted while in test operation.
• LED lamp on outdoor unit PCB H2P blinks (test operation)
• Remote controller Indicates “Under Centralized Control” on upper
right.
Indicates “Test Operation” on lower left
h
h
H1PH2P H3P H4PH5P H6P H7P
h
k
k
k
h
h
h
h
h
h
h
h
(For normal completion)
(For abnormal completion)
Error code
Nonconformity during installation
Remedial action
E3
The stop valve of outdoor unit is left closed. Open the gas-side stop valve and the liquid-side stop valve.
Refrigerant overcharge.
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 outdoor unit is left closed. Open the gas-side stop valve and the liquid-side stop valve.
Insufficient refrigerant.
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 overcharge.
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 outdoor unit is left closed. Open the gas-side stop valve and the liquid-side stop valve.
Insufficient refrigerant.
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 overcharge
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 outdoor unit.
Turn the power on for the outdoor unit.
UF
The stop valve of 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 PCB.
