Daikin RTSQ20PY1 Service Manual page 227

SiBE31-801_C
Malfunction code indication by outdoor unit
PCB
<Monitor mode>
To enter the monitor mode, push the
MODE (BS1) button when in "Setting
mode 1".
* Refer to Page 176 for Monitor mode.
<Selection of setting item>
Push the SET (BS2) button and set
the LED display to a setting item.
* Refer to Page 176 for Monitor mode.
<Confirmation of malfunction 1>
Push the RETURN (BS3) button once
to display "First digit" of malfunction
code.
<Confirmation of malfunction 2>
Push the SET (BS2) button once to
display "Second digit" of malfunction
code.
<Confirmation of malfunction 3>
Push the SET (BS2) button once to
display "malfunction location".
<Confirmation of malfunction 4>
Push the SET (BS2) button once to
display "master or slave 1 or slave 2"
and "malfunction location".
Push the RETURN (BS3) button and
switches to the initial status of
"Monitor mode".
* Push the MODE (BS1) button and
returns to "Setting mode 1".
Troubleshooting
Description of malfunction
PCB malfunction
Abnormal discharge pressure
Abnormal suction pressure
Compressor lock
OC activation
Overload, overcurrent and abnormal
lock of outdoor unit fan motor
Electronic expansion valve
malfunction
Abnormal discharge pipe temperature Td malfunction
Abnormal heat exchanger temperature Refrigerant overcharged
Positioning signal malfunction of
outdoor unit fan motor
Abnormal outdoor temperature
Current sensor malfunction
Discharge pipe temperature sensor
Detail
malfunction
description
on next
page.
Heat exchanger gas temperature
sensor malfunction
Suction pipe temperature sensor
malfunction
Heat exchanger temperature sensor
malfunction
Liquid pipe temperature sensor
malfunction
Heat exchanger liquid pipe
temperature sensor malfunction
Subcooling heat exchanger
temperature sensor malfunction
Discharge pressure sensor malfunction Pc sensor malfunction (S1NPH)
Suction pressure sensor malfunction
INV PCB malfunction
Rise in INV radiation fin temperature
DC output overcurrent
Electronic thermal
Stall prevention (time limit)
INV transmission malfunction
Troubleshooting by Remote Controller
Malfunctions
Description of malfunction (PGF)
PCB malfunction
Faulty PCB
High pressure switch activated
Pe malfunction
INV compressor lock detected
STD1 compressor lock detected
STD2 compressor lock detected
Instantaneous overcurrent of 1DC fan motor
1DC fan motor lock detected
Fan 1 IPM faulty protection detected
Instantaneous overcurrent of 2DC fan motor
2DC fan motor lock detected
Fan 2 IPM faulty protection detected
EVM (main)
EVJ (refrigerant charging)
EVT (subcooling heat exchanger)
1DC fan motor positioning signal
malfunction
2DC fan motor positioning signal
malfunction
Ta sensor malfunction (short-circuited
or open)
CT1 sensor malfunction (STD
compressor 1)
CT2 sensor malfunction (STD
compressor 2)
CT sensor malfunction (system)
Tdi sensor malfunction
Tds1 sensor malfunction (short-
circuited)
Tds2 sensor malfunction (short-
circuited)
Tg sensor malfunction (R2T)
TsA sensor malfunction (short-
circuited) (R8T)
Tb sensor malfunction (R4T)
Tsc sensor malfunction (R6T)
TL sensor malfunction (R9T)
Tf sensor malfunction (R7T)
Tsh sensor malfunction (R5T)
Pe sensor malfunction (S1NPL)
Faulty IPM
Current sensor failure confirmation 1
Current sensor failure confirmation 2
IGBT malfunction
Overheat of INV radiation fin temperature
INV compressor (outdoor unit)
INV compressor (function unit)
Electronic thermal 1
Electronic thermal 2
Loss of synchronization
Speed degradation after startup
Thunder detected
Stall prevention (increased current)
Stall prevention (startup failure)
Abnormal starting waveform
Loss of synchronization
INV transmission data malfunction
INV transmission malfunction
k
: ON
l
: Blink
h
: OFF
Malfunction
code
Remote
controller
E1
E3
E4
E5
E6
E7
E9
F3
F6
H7
H9
J2
J3
J4
J5
J6
J7
J8
J9
JA
JC
L1
L4
L5
L8
L9
LC
216