Download  Print this page

Troubleshooting - Mitsubishi Electric Mr.Slim PEAD-RP35JALQ Service Manual

Series pead, ceiling concealed r410, 2010 split-type, heat pump air conditioners.
Hide thumbs

Advertisement

9

TROUBLESHOOTING

9-1. CAUTIONS ON TROUBLESHOOTING
(1) Before troubleshooting, check the followings:
1 Check the power supply voltage.
2 Check the indoor/outdoor connecting wire for mis-wiring.
(2) Take care the followings during servicing.
1 Before servicing the air conditioner, be sure to turn off the remote controller first to stop the main unit, and then turn
off the breaker.
2 When removing the indoor controller board, hold the edge of the board with care NOT to apply stress on the
components.
3 When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.
9-2. SELF-CHECK FUNCTION
Wired remote controller
(1) Turn on the power.
(2) Press the [CHECK] button twice.
(3) Set refrigerant address with [TEMP] button
if system control is used.
(4) Press the [ON/OFF] button to stop the
self-check.
A A CHECK button
B B Refrigerant address
C C TEMP button
D D IC : Indoor unit
OC : Outdoor unit
E E Check code
• For description of each check code, refer to the following table.
1
Check code
P1
Intake sensor error
P2
Pipe (TH2) sensor error
P9
Pipe (TH5) sensor error
E6,E7
Indoor/outdoor unit communication error
P4
Drain sensor error
P5
Drain pump error
P6
Freezing/Overheating protection operation
EE
Communication error between indoor and outdoor units
P8
Pipe temperature error
E0, E3~E5
Remote controller transmission error
E1, E2
Remote controller control board error
Fb
Indoor unit control system error (memory error, etc.)
E9
Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)
UP
Compressor overcurrent interruption
U3,U4
Open/short of outdoor unit thermistors
UF
Compressor overcurrent interruption (When compressor locked)
U2
Abnormal high discharging temperature/49C worked/insufficient refrigerant
U1,Ud
Abnormal high pressure (63H worked)/Overheating protection operation
U5
Abnormal temperature of heat sink
U8
Outdoor unit fan safeguard stop
U6
Compressor overcurrent interruption/Abnormal of power module
U7
Abnormality of super heat due to low discharge temperature
U9,UH
Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit
/Current sensor error
Others
Other errors (Refer to the technical manual for the outdoor unit.)
• On wired remote controller.
1 Check code displayed in the LCD.
Lead wires
C
PAR-21MAA
Symptom
26
B
E D
˚C
˚C
SIMPLE
TEMP.
ON/OFF
MENU
ON/OFF
FILTER
BACK
MONITOR/SET
DAY
CHECK
TEST
CLOCK
OPERATION
CLEAR
A
Remark
For details, check the LED display
of the outdoor controller board.
As for outdoor unit, refer to
service manual OC322.

Advertisement

Comments to this Manuals

Symbols: 0
Latest comments: