Mitsubishi Electric PKA-RP1.6GAL Service Technical Manual page 37

(5) Start-up system
A control unit is applicable to any models of standard (1:1), twin and triple without switch setting according to carrying out the
below process automatically when the power is supplied.
When the power is supplied, following processes of 1 Refrigerant address transmitting, 2 Power supply control to remote
controller, 3 Set number of the connected unit, 4 Set number of the indoor unit, 5 Duplication detection, 6 Collecting the unit
information and 7 Collecting the operation data are carried out as shown on the figure.
Also when detecting the duplicated setting in the step 5, back to the first step and reset it.
Power ON
1 Refrigerant address
transmitting
2 Refrigerant
address "0"?
NO
3 Set number of the
connected unit
4 Set number of the
indoor unit
5 Duplication
detection
NO
6 Collecting the unit
information
7 Collecting the
operation data
Set up finish
<<Feature>>
A. Start-up time from the second time will be shorter since setting of the number of connected units is memorized once set.
Start-up time can be estimated as following;
•When installing ... 1~2 minutes (Depending the number of connecting units)
•Since the second time .... 20 seconds ~ 1 minute (Depending the number of connecting units)
w When the above processing does not finish, even if 4 minutes have passed, consider the processing an error and
Ea, Eb or Ec will be displayed.
However if power is not supplied to the indoor unit due to miss-wiring or looseness of the connecting lines
between the indoor and outdoor unit, there will be no display on the remote controller. Also when the data can not
be received from the outdoor unit, E6 is displayed on the remote controller after 6 minutes.
B. When replacing the p.c.board, only the unit number which has had it`s p.c.board replaced is reset.
Even if the power supply is reset, the unit number which has not had it`s replaced does not change.
C. Automatic set unit is possible to confirm by blinking the frequency of LED3 in the indoor controller board.
At intervals of approx. 3 seconds, the number of the unit-number blinks.(Example:The unit(unit number:2) blinks twice at
3-second intervals.
Example
2 blinking
YES
Power supply control
to remote controller
YES
Not lighted 2 blinking
3 seconds
; Transmitting the switch setting
contents on the outdoor unit
remote controller
(SW1-3~6)
; Feeding control to remote
controller
Feeding the indoor unit of the
refrigerant address "0"
; If there are 2 or more speci-
fied indoor unit, back to the
first step.
; Collecting the vane, louver
information and transmittance
to the remote controller.
; Collecting the preceding oper-
ation setting information and
transmittance to the remote
controller.
37
EA error if 4 minutes have
passed since the power is
supplied.
EB error if 4 minutes have
passed since the power is
supplied.
EC error if 4 minutes have
passed since the power is
supplied.