16
OCHT669
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OPERATION
INDICATOR
lamp blinking
pattern
Beep
Beep
Beep
Beep
Beep
Beep
Beep
Off
Approx. 2.5 s
On
Approx. 3 s
On
0.5 s
On
0.5 s
On
0.5 s
On
0.5 s
Off
Approx. 2.5 s
On
Approx. 3 s
On
0.5 s
On
0.5 s
· · · Repeated
Number of blinks/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “U2”)
Number of blinks/beeps in pattern indicates
the check code in the following table
nth
1st
2nd
3rd
1st
2nd
Self-check
starts
(Start signal
received)
Beeper sounds
[Output pattern B]
[Output pattern A]
OPERATION
INDICATOR
lamp blinking
pattern
Beep
Beep
Beep
Beep
Beep
Beep
Beep
Off
Approx. 2.5 s
On
0.5 s
On
0.5 s
On
0.5 s
On
0.5 s
Off
Approx. 2.5 s
On
0.5 s
On
0.5 s
· · · Repeated
Number of blinks/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “P5”)
Number of blinks/beeps in pattern indicates
the check code in the following table
nth
1st
2nd
3rd
1st
2nd
Self-check
starts
(Start signal
received)
Beeper sounds
Refer to the following tables for details on the check codes.
[Output pattern A] Errors detected by indoor unit
Wireless remote controller
Wired remote
controller
Symptom
Remark
Beeper sounds/OPERATION
INDICATOR lamp blinks
(Number of times)
Check code
1
P1
Intake sensor error
2
P2, P9
Pipe (liquid or 2-phase pipe) sensor error
3
E6, E7
Indoor/outdoor unit communication error
4
P4
Float switch connector open
5
P5
Drain pump error
PA
Forced compressor error
6
P6
Freezing (during cooling operation)/Overheating protection operation (during
heating operation)
7
EE
Assembly error (system error)
8
P8
Pipe temperature error
9
E4
Communication error between wired remote controller and indoor unit
10
—
—
11
PB(Pb)
Indoor unit fan motor error
12
FB(Fb)
Indoor unit control system error (memory error, etc.)
14
PL
Refrigerant circuit abnormal
[Output pattern B] Errors detected by unit other than indoor unit (outdoor unit, etc.)
Note: The supported check codes may vary depending on the connected outdoor unit.
Wireless remote controller
Wired remote
controller
Symptom
Remark
Beeper sounds/OPERATION
INDICATOR lamp blinks
(Number of times)
Check code
1
E9
Indoor/outdoor unit communication error
For details, check the LED
display of the outdoor
controller board.
2
UP
Compressor overcurrent interruption
3
U3, U4
Open/short of outdoor unit thermistors
4
UF
Compressor overcurrent interruption (When compressor locked)
5
U2
Abnormal high discharging temperature/49C worked/insufficient refrigerant
6
U1, Ud
Abnormal high pressure (63H worked)/Overheating protection operation
7
U5
Abnormal temperature of heat sink
8
U8
Outdoor unit fan protection stop
9
U6
Compressor overcurrent interruption/Abnormal of power module
10
U7
Abnormality of super heat due to low discharge temperature
11
U9, UH
Abnormality such as overvoltage or voltage shortage and abnormal synchro-
nous signal to main circuit/Current sensor error
12
—
—
13
—
—
14
Others
Other errors (Refer to the technical manual for the outdoor unit.)
Notes:
1. If the beeper does not sound again after the initial 2 beeps to confirm the self-check start signal was received and the OPERATION INDICATOR lamp does not
come on, there are no error records.
2. If the beeper sounds 3 times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 seconds)” after the initial 2 beeps to confirm the self-check start signal was received,
the specified refrigerant address is incorrect.
• On wireless remote controller
The continuous buzzer sounds from receiving section of indoor unit.
Blink of operation lamp
• On wired remote controller
Check code displayed in the LCD.
