Mitsubishi Electric Mr.Slim PKA-M35HA Service Manual page 20

• Refer to the following tables for details on the check codes.
[Output pattern A]
Beeper sounds Beep
OPERATION
INDICATOR
lamp flash
Off
pattern
Approx. 2.5 s
Self-check
starts
(Start signal
Number of flashes/beeps in pattern indicates the check
received)
code in the following table (i.e., n=5 for "P5")
[Output pattern B]
Beeper sounds Beep
OPERATION
INDICATOR
lamp flash
Off
pattern
Approx. 2.5 s
Self-check
starts
(Start signal
received)
[Output pattern A] Errors detected by indoor unit
Wireless remote controller
Beeper sounds/OPERATION
INDICATOR lamp flashes
(Number of times)
1
2
3
4
5
6
7
8
9
10
11
12
14
–
–
[Output pattern B] Errors detected by unit other than indoor unit (outdoor unit, etc.)
Wireless remote controller
Beeper sounds/OPERATION
INDICATOR lamp flashes
(Number of times)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
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.
OCH660
Beep Beep Beep Beep
1 st 2 nd 3 rd n th
On On On
On
0.5 s 0.5 s 0.5 s
0.5 s
Beep Beep Beep
st nd
1 2
On On On
Approx. 3 s 0.5 s 0.5 s
Number of flashes/beeps in pattern indicates the check
code in the following table (i.e., n=5 for "U2")
Wired remote controller
Check code
P1
Intake sensor error
P2 Pipe (TH2) sensor error
P9 Pipe (TH5) sensor error
Indoor/outdoor unit communication error
E6,E7
P4 Drain sensor error/Float switch connector (CN4F) open
P5 Drain pump error
PA Forced compressor stop(due to water leakage abnormality)
P6 Freezing/Overheating protection operation
EE Combination error between indoor and outdoor units
P8 Pipe temperature error
E4, E5 Remote controller signal receiving error
– –
Pb
Indoor unit fan motor error
Fb Indoor unit control system error (memory error, etc.)
Abnormal refrigerant circuit
PL
Remote controller transmission error
E0, E3
E1, E2 Remote controller control board error
Wired remote controller
Check code
Indoor/outdoor unit communication error
E9
(Transmitting error) (Outdoor unit)
Compressor overcurrent interruption
UP
Open/short of outdoor unit thermistors
U3,U4
UF Compressor overcurrent interruption (When compressor locked)
Abnormal high discharging temperature/49C worked/
U2
insufficient refrigerant
Abnormal high pressure (63H worked)/Overheating
U1,Ud
protection operation
Abnormal temperature of heat sink
U5
Outdoor unit fan protection stop
U8
Compressor overcurrent interruption/Abnormal of power module
U6
Abnormality of super heat due to low discharge temperature
U7
Abnormality such as overvoltage or voltage shortage and
U9,UH
abnormal synchronous signal to main circuit/Current sensor error
– –
– –
Others Other errors (Refer to the technical manual for the outdoor unit.)
Beep Beep
1 st 2 nd · · · Repeated
Off On On
Approx. 2.5 s 0.5 s 0.5 s
Number of flashes/beeps in pattern indicates
the check code in the following table
Beep
rd th
3 n
On On Off
0.5 s 0.5 s Approx. 2.5 s
Symptom
Symptom
20
Beep Beep
st nd
1 2 · · · Repeated
On On On
Approx. 3 s 0.5 s 0.5 s
Number of flashes/beeps in pattern indicates
the check code in the following table
Remark
Remark
For details, check
the LED display
of the outdoor
controller board.
As for outdoor
unit, refer to
outdoor unit's
service manual.