Daikin FTXR-T Series, Руководство по обслуживанию

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SiUS041829E Troubleshooting
Part 6 Service Diagnosis 73
Reference
4.3 Freeze-up Protection Control/Heating Peak-cut Control
Error Code
A5
Method of Error
Detection
 Freeze-up protection control
During cooling operation, the freeze-up protection control (operation halt) is activated according
to the temperature detected by the indoor heat exchanger thermistor.
 Heating peak-cut control
During heating operation, the temperature detected by the indoor heat exchanger thermistor is
used for the heating peak-cut control (operation halt, outdoor fan stop, etc.)
Error Decision
Conditions
 Freeze-up protection control
During cooling operation, the indoor heat exchanger temperature is below 0°C (32°F).
 Heating peak-cut control
During heating operation, the indoor heat exchanger temperature is above 62.5°C (144.5°F).
Supposed
Causes  Short-circuited air
 Clogged air filter of the indoor unit
 Dust accumulation on the indoor heat exchanger

Defective indoor heat exchanger thermistor
 Defective indoor unit PCB
Troubleshooting
Check No.01 Refer to P.112
NO
NO
NO
Check No. 01
Check the indoor heat exchanger
thermistor.
YES
YES
(R21064)
YES
YES
NO
Caution
Provide s u fficient air passage.
Clean the air filter.
Clean the indoor heat
exchanger.
Replace the indoor u nit PCB
(control PCB).
Replace the indoor heat
exchanger thermistor.
As
described in the
thermistor characteristic
chart?
Check the air filter.
Check the d u st acc u m u lation on
the indoor heat exchanger.
Is there any short circ u it?
Dirty?
Dirty?
Check the air passage.
Be s u re to t u rn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.