7–segment indication Result Indications
Sufficient refrigerant
The refrigerant amount is sufficient.
• Place contact number 4 of DSW5 (on PCB1) to
OFF and carry out the test run.
Excessive refrigerant
The refrigerant amount is excessive.
• Calculate the refrigerant charge according to the length of the refrigerant pipes.
•
Collect the charged refrigerant appropriately and charge the unit with correct amount of
refrigerant.
Insufficient refrigerant
The refrigerant charge is insufficient.
• Check whether the unit has been charged with additional refrigerant.
•
Calculate the refrigerant charge according to the length of the refrigerant pipes and carry
out the charge the unit with correct amount of refrigerant.
Abnormal termination
Locate the cause of the abnormal termination in line with the instructions below. After fixing
the cause of the abnormal termination, restart the check operation.
1. Is the contact 4 of DSW5 (on PCB1) in the ON position before power supply is applied?
2.
Are all the indoor units ready and waiting before placing contact 4 of DSW5 (on PCB1) to
the ON position?
3. Is the outdoor ambient temperature between the applicable range (0 – 43 °C)?. (In some
cases, when the number of indoor units connected exceeds the maximum recommended
number, and the outdoor temperature is over 35 °C, this check cannot be carried out).
4. Is the total indoor units operating total capacity ratio 30% or lower?
5. Is contact 4 of DSW4 (compressor forced stoppage) in the OFF position?
(4) Place contact 4 of DSW5 (on PCB1) to the OFF position when the refrigerant amount is sufficient.
Wait a
maximum of three minutes after placing contact 4 of DSW5 (on PCB1) to the OFF position so that the outdoor unit
is ready for operation.
N O T E
During the
check, the indication on the 7-segment display may be changed to the protection control code by the
activation of the protection control, although this is normal.
7.2.7 Reset for accumulated operation time of compressor 1-2 after maintenance (cUJ1-
cUJ2)
< Procedure >
Press PSW1 and PSW3 for 5 seconds, while the compressor accumulated operation time data is displayed.
PSW2
P S W 3
Press PSW1 and PSW3 for 5 seconds while the accumulated operation time is
displayed.
“cUJ1” (Accumulated Operation Time of Compressor 1) will be indicated.
The indication will be changed to “0”.
(The accumulated operation time of compressor 1 is “0”)
<Example of Compressor 1>1>
N O T E
In the case of the 20 to 54 HP units, reset the accumulated operation time is required for each outdoor units.
7 Test run
145
SMGB0065 rev. 1 - 12/2010
7
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