Radiation Fin Temperature Rise - Daikin SkyAir RZR-P Series Service Manual

Troubleshooting by Remote Controller

2.36 Radiation Fin Temperature Rise

L4
Remote
Controller
Display
Applicable RZR, RZQ
Models
Method of Error
Radiation fin temperature is detected by radiation fin thermistor.
Detection
Error Decision
When the temperature of the inverter radiation fin rises abnormally due to defective heat
Conditions dissipation.
 Defective radiation fin thermistor
Supposed
 High outdoor air temperature
Causes
 Blocked suction opening
 Dirty radiation fin
 Defective outdoor unit inverter PCB
 Activation of fin thermal switch
 Insufficient cooling of inverter radiation fin
 Defective connection of connector
Troubleshooting
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
The
radiation fin
temperature is supposed to
have risen to 180°F
or more.
NO
Is the
connector X111A of
the radiation fin thermistor properly
connected to the outdoor
unit PCB?
YES
Turn ON the power supply,
and then press the remote
controller check button once.
Is the
P4
error code " "
displayed on the remote
controller?
NO
Does the
L4
error code " "
recur when the unit starts
operation?
NO
YES
NO
YES
YES
SiUS281117
Defective heat radiation of power
unit
• Air suction opening blocked
• Dirty radiation fin
• High outdoor air temperature
Connect properly.
P4
To " " troubleshooting
Replace the outdoor unit PCB
(A1P) as well.
Continue the operation.
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