-
241
-
4) Recording and reset of error
Notes (1) Priority is in the order of E1 > ... > E10 > ... > E60.
(2) Procedures of trouble diagnosis
When any error occurs, inspect in following sequence. Detailed explanation on each step is given later in this text.
Error display
Memory
Reset
Error code of remote
controller
Indoor unit inspection lamp
(red)
• Saves the error code
(1)
with higher
priority in memory
• Stop the unit operation by pressing the ON/OFF button of remote
controller.
• Operation can be started again if the error has been restored.
• Saves the error code
(1)
with higher
priority in memory
• Cannot save in memory
Outdoor unit inspection lamp
(red)
Error
Check of inspection display [In-
door/outdoor unit PCB, remote
controller or Indication board]
Power supply check
(indoor/outdoor unit)
Replacement or repair of defective
parts Test run/adjustment
Check of unit
controller
Check remote controller for
anomalous operation data.
Indoor unit
Outdoor unit
: Press the ON/OFF button on the remote controller. Or disconnect and reconnect the power supply connector
(CNW1 or CNW0) on the indoor unit control PCB or turn the main power supply OFF.
: Turn the main power supply OFF.
(3) Error diagnosis procedures at the indoor unit side
To diagnose the error, measure the voltage (AC, DC), resistance, etc. at each connector around the PCB of indoor unit based on
the inspection display or the operation state of unit (no operation of compressor or blower, no switching of 4-way valve, etc.) If
any defective parts are discoverd, replace with the assembly of parts as shown below.
(a) Single-unit replacement parts for PCB of indoor unit.
(Peripheral electric parts for circuit board.)
Indoor unit printed circuit board, thermistor (air return, heat exchanger), operating switches, limit switches, transformers,
fuses.
Note (1) Use normal inspection methods to determine the condition of strong electrical circuits and frozen cycle parts.
(b) Replacement procedure of indoor unit microcomputer printed circuit board
Microcomputer printed circuit board can be replaced with following procedure.
(i) Confirm the parts numbers.
PJA505A122ZD
PJA505A122ZF
PJA505A128ZF
Parts number
FDTA 151~401
FDTA 501, 601
FDEN
Model
FDKN
FDUM, FDU
FDTC
Model
PHA505A018ZF
PJA505A131ZC
PJA505A142ZA
Parts number
