Daikin FTXR-T Series, Service Manual

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Troubleshooting SiUS041829E
106 Part 6 Service Diagnosis
Reference
Reference
4.23 Electrical Box Temperature Rise
Error Code
L3
Method of Error
Detection
An electrical box temperature rise is detected by checking the radiation fin thermistor with the
compressor off.
Error Decision
Conditions
 With the compressor off, the radiation fin temperature is above A .
 The error is cleared when the radiation fin temperature drops below B .
 To cool the electrical components, the outdoor fan starts when the radiation fin temperature
rises above
C and stops when the radiation fin temperature drops below B .
Supposed
Causes
 Defective outdoor fan motor

Short circuit
 Defective radiation fin thermistor
 Disconnection of connector
 Defective outdoor unit PCB
Troubleshooting
Check No.17 Refer to P.118
Check No.19 Refer to P.119
A B C
°C °F °C °F °C °F
09/12 class 82 179.6 65 149 70 158
18 class 90 194 64 147.2 81 177.8
Caution
WARNING
To cool the electrical components,
the o
u tdoor fan starts when the
radiation fin temperat u re rises
above C and stops when the radiation
fin temperat u re drops below B .
(R22998)
YES
NO
YES
NG
NO
OK
NO
YES
T u rn off the power. Then, t u rn on
the power to restart the system.
Check the radiation fin
temperat
u re.
Radiation fin dirty?
Check No. 19
Check the o u tdoor fan.
Error again or
o u tdoor fan activated?
Replace the o u tdoor u nit
PCB (main PCB).
Clean u p the radiation fin.
Be s u re to t u rn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Replace the o u tdoor fan
motor.
Correct the connectors
and fan motor lead wire.
Replace the o
u tdoor u nit
PCB (main PCB).
Above A ?
Check the installation
condition.
Go to
Check No. 17 .