Daikin RZQ140B7W1B [238/326] Malfunction of radiator fin temperature thermistor p4

Daikin RZQ100B8V3B [238/326] Malfunction of radiator fin temperature thermistor p4
Error Codes: Outdoor Units ESIE05-03
3–90 Part 3 Troubleshooting
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3.20 Malfunction of Radiator Fin Temperature Thermistor (P4)
Remote Controller
Display
P4
Method of
Malfunction
Detection
Detection by open or short circuit of the radiator fin temperature thermistor during the compressor
stops operating.
Malfunction
Decision
Conditions
When open or short circuit of the radiator fin temperature thermistor is detected during the compressor
stops operating
Supposed Causes
P Faulty radiator fin temperature thermistor
P Faulty outdoor unit PC board
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be
occurred.
Disconnect the connector
from (∗) on inverter PC
board, then check the
thermistor resistance at the
ordinary temperature.
(RZQ71 only)
Normal?
(Note)
Check LED on the
outdoor unit PC board.
Reset
Does the radiator
fin temperature thermistor
malfunction?
Is reset possible?
(∗) Connector number :
RZQ71 : X207A
RZQ100 ~ 140 : X111A
YES
NO
YES
NO
NO
YES
Probe other factors than the malfunction.
Replace the thermistor.
Replace the inverter PC board.
Continuous operation can be continued.
* See page 3-107 and page 3-108 for “Thermistor temperature/Resistance characteristics”.
ESIE05-03.book Page 90 Wednesday, April 6, 2005 4:09 PM

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