Indoor Service Manual

16 17
OCH669A
Continued to the next page
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
n
th
1
st
2
nd
3
rd
1
st
2
nd
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
n
th
1
st
2
nd
3
rd
1
st
2
nd
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/insufcient 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 conrm 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 conrm the self-check start signal was received,
the specied 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.