Daikin REYQ8-48PY1B, Service Manual

Page: 266 / 477

Troubleshooting by Remote Controller SiBE37-701_B
255 Troubleshooting
Malfunction code indication by outdoor unit
PCB
<Monitor mode>
To enter the monitor mode, push the
MODE (BS1) button when in “Setting
mode 1”.
<Selection of setting item>
* Refer to Page 220 for Monitor mode.
* Refer to Page 220 for Monitor mode.
Push the SET (BS2) button and set
the LED display to a setting item.
<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".
Detail
description
on next
page.
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”.
Malfunctions Malfunction
code
Description of malfunction Description of malfunction (PGF) Remote
controller
PCB malfunction PCB malfunction E1
Faulty PCB
Abnormal discharge pressure HPS activated E3
Abnormal suction pressure Pe malfunction E4
Compressor lock INV compressor lock detected E5
OC activation STD1 compressor lock detected E6
STD2 compressor lock detected
Overload, overcurrent and abnormal
lock of outdoor unit fan motor Instantaneous overcurrent of 1DC fan motor E7
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
Electronic expansion valve
malfunction EVM (main) E9
EVJ (refrigerant charging)
EVT (subcool heat exchanger)
Positioning signal malfunction of
outdoor unit fan motor 1DC fan motor positioning signal
malfunction H7
2DC fan motor positioning signal
malfunction
Abnormal outdoor temperature Ta sensor malfunction (short-circuited
or open) H9
Abnormal discharge pipe temperature Td malfunction F3
Abnormal heat exchanger temperature Refrigerant overcharged F6
BS unit electronic expansion valve
malfunction BS EVH disconnected (Y4E) F9
BS EVL disconnected (Y5E)
BS EVHS disconnected (Y2E)
BS EVLS disconnected (Y3E)
BS EVSC disconnected (Y1E)
Current sensor malfunction CT1 sensor malfunction (STD
compressor 1) J2
CT2 sensor malfunction (STD
compressor 2)
CT sensor malfunction (system)
Discharge pipe temperature sensor
malfunction Tdi sensor malfunction (R31T) J3
Tds1 sensor malfunction (short-
circuited) (R32T)
Tds2 sensor malfunction (short-
circuited) (R33T)
Heat exchanger gas temperature
sensor malfunction Tg sensor malfunction (R2T, R11T) J4
Suction pipe temperature sensor
malfunction TsA sensor malfunction (short-
circuited) (R8T, R10T) J5
Heat exchanger temperature sensor
malfunction Tb sensor malfunction (R4T, R12T) J6
Liquid pipe temperature sensor
malfunction Tsc sensor malfunction (R6T, R14T) J7
TL sensor malfunction (R9T)
Heat exchanger liquid pipe
temperature sensor malfunction Tf sensor malfunction (R7T, R15T) J8
Subcool heat exchanger temperature
sensor malfunction Tsh sensor malfunction (R5T, R13T) J9
Discharge pressure sensor malfunction Pc sensor malfunction (S1NPH) JA
Suction pressure sensor malfunction Pe sensor malfunction (S1NPL) JC
INV PCB malfunction Faulty IPM
Current sensor failure confirmation 1
Current sensor failure confirmation 2
IGBT malfunction L1
Rise in INV radiation fin temperature
Overheat of INV radiation fin temperature
L4
DC output overcurrent Instantaneous overcurrent of INV L5
IGBT malfunction
Electronic thermal Electronic thermal 1 L8
Electronic thermal 2
Loss of synchronization
Speed degradation after startup
Thunder detected
Stall prevention (time limit) Stall prevention (increased current) L9
Stall prevention (startup failure)
Abnormal starting waveform
Loss of synchronization
INV transmission malfunction INV transmission data malfunction LC
INV transmission malfunction
k
: ON
l
: Blink
h
: OFF