Daikin IM 696-4 59
Test Procedures
Figure 28: Main control board
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: : : : : : : : : : : : : : : : : : : :
B I - 1
B I - 8
B I - 1
B I -
B T T Y
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S W - 1
S W - 4
B C n e t I P
( O P T I O N L )
M I N
C O N T O L B O D
S - 4 8 5 B S
P O T
N L O G
I N P T S
S - 2 3 2
P O T
P O T
B I N Y
I N P T S
2 4 V C I N P T
P O W
N L O G
O
B I N Y
O T P T S
B O - 1
B O - 1
O
L D
2 4 V C
I S O L T I O N
P O W F O
O / B O s
+ 1 5 V D C
P O W
F O I s
S - 4 8 5
C T I V I T Y
L D
S - 2 3 2
C T I V I T Y
L D
I P
C T I V I T Y L D
B C n e t M S / T P
o r L o n M a r k
C O M M . M O D L
( O P T I O N L )
: : : : : :
C O M M . M O D L
I P
MCB Error Code Display Period. After the LED Operational
Check period is complete, if any MCB startup errors are
detected, an error code displays. For details regarding the
various LED error codes, refer to “MCB LED Startup Error
Codes” below.
If no startup errors are detected, all LEDs remain OFF and
the
MCB Initialization period occurs as described below.
MCB Initialization Period. When the MCB Error Code
Display period is complete, MCB Initialization begins. This
period consists of the following LED sequence:
1 All the LEDs remain OFF for approximately 15–20
seconds (with a normal battery). If the battery is low or
defective, this period lasts approximately 90 seconds
during which previously archived control parameter data is
restored to the controller. Refer to “Main Control Board
(MCB) Data Archiving” on page 33.
2 The RS-485 Bus Port Activity Indication LED in the lower
left corner of MCB begins blinking indicating activity on
the RS-485 bus port, and after an approximate 1–2 second
delay, the Binary Input LEDs turn ON according to the
Binary Input switch conditions.
3 After a 15–20 second pause, the Binary Output LEDs on
the right side of the board turn ON, according to the control
program logic, and the startup sequence is complete.
Note – The elapsed time for the entire startup sequence,
including the LED Operational Check, the MCB Error
Code Display, and the MCB Initialization period is
approximately 45 to 120 seconds depending on the
network configuration and the MCB battery condition.