30
8-4. Setting for Electric Current Suppressor
To match the existing circuit breaker in home installations, the unit has a switch to
alter electric current by frequency control to either of three levels (FREE/11/8.5A).
A switch is located on the terminal plate of the outdoor unit. Installers should set the
switch for the necessary current referring to Fig. 9 and Table 3)
The factory setting is 11A.
Table 3
Electric current setting (A)
8.5
11
Free
Switch position
Left
Center
Right
Fig. 9
AMP
8
0
1
OFF ON
12
1
2
3
4
11FREE
D001
D002
R002
D003
D004
PIPE
CHECK SW
PIPE
CHECK TRIP
UNIT / TRIP
POW CMV2441G IC1CN01
1FA4B1A036000-0
D005
D006
D007
Q003
R004
8-5. Tubing Check Function
After tubing and wiring connections are completed, following air purging with a vacuum pump, be sure to confirm
once more that all tubing has been carried out correctly. This can be done with the Tubing Checker function on
the terminal plate of the outdoor unit (Fig. 9). It also confirms the correct operation of all expansion valves.
To perform Tubing Check function:
(1)
Turn the main power ON. (Before turning the power ON, confirm that the Tubing Check Switch is OFF.)
(2)
Turn the Tubing Check Switch on (Green lamp illuminates / “PIPE CHECK” in Fig. 9)
At this stage, the indoor fan is operating at low speed, and you will see 3 lamps illuminated on the display of
the indoor unit. (Outdoor fan is operating at low speed, and compressor is operating at low speed.)
(3)
After 90 seconds, the compressor (only) stops operating, and after a 3-minute delay, it starts to operate
again at low speed. Tubing Check commences at this time.
(4)
Indoor units A to D are checked, which takes a maximum of 2 minutes for each unit. If an error exists, lamps
0 to 4 glow red to identify the error. Possible errors include an electronic expansion valve not opening or the
tubing connection or wiring between the indoor and outdoor units is wrong.
(5)
When no problems are found during the check, all lamps 0 to 4 turn to red.
(6)
Be sure to turn the Tubing Check Switch off after the checking is completed.
●
The wide tube is not checked by this Tubing Check Function.
●
If more than one error is detected, each error is displayed at 4-second intervals.
●
This function works only when the outdoor temperature is between 10°C and 43°C. However, this function
does not work when the electric current suppressor is set to 8.5A and the outdoor temperature exceeds 35°C.
Therefore, it is necessary to physically examine the connections unit by unit.
●
If the Tubing Check Lamp flashes, it is not possible to continue with the check operation due to one or more of
the following reasons: trip, alarm, and no indoor unit connected. To perform the Tubing Check again, turn the
main power ON, and then turn the Tubing Check Switch OFF. You must then wait at least 20 minutes before
turning the main power ON again. Then, turn the Tubing Check Switch ON. Therefore, it is necessary to physi-
cally examine the connections unit by unit.
●
If an electronic expansion valve fails to open, check the valve. Replace it if necessary.
NOTE
