Display Sequence Of Error Codes Or Inspection Indicator Lamps; Occurrence Of One Kind Of Error; Occurrence Of Plural Kinds Of Error; Error Detecting Timing - Mitsubishi Heavy Industries FDT Series Technical Manual

(iv) Display sequence of error codes or inspection indicator lamps

Occurrence of one kind of error

Displays are shown respectively according to errors.

Occurrence of plural kinds of error

Section
Error code on remote
• Displays the error of higher priority (When plural errors are persisting)
controller
Red LED on indoor
control PCB
Red LED on outdoor • Displays the present errors. (When a new error has occurred after the former error was reset.)
control PCB

Error detecting timing

Section Error description
activated)
Communication error at
initial operation
Remote controller
communication circuit error
Communication error during
operation
Indoor
Excessive number of
connected indoor units by
controlling with one remote
controller
Return air temperature
thermistor anomaly
Indoor heat exchanger
temperature thermistor
anomaly
Outdoor air temperature
thermistor anomaly
Outdoor heat exchanger
temperature thermistor
anomaly
Discharge pipe temperature
Outdoor
thermistor anomaly
Suction pipe temperature
thermistor anomaly
Low pressure sensor anomaly
Underneath temperature
thermistor anomaly
Notes (1) Value in ( ) are for the models SRC40-60.
(2) Value in are for the SRK series.
Category of display
Error code
Whenever float switch is activated after 30 second had past since
power ON.
No communication between indoor and outdoor units is
" "
WAIT
established at initial operation.
Communication between indoor unit and remote controller is
interrupted for mote than 2 minutes continuously after initial
communication was established.
Communication between indoor and outdoor units is interrupted
for mote than 2 minutes continuously after initial communication
was established.
Whenever excessively connected indoor units is detected after
power ON.
-20 -45 °C or lower is detected for 5 15 seconds continuously
within 60 minutes after initial detection of this anomalous
temperature.
-40 °C or lower is detected for 5 15 seconds continuously
within 60 minutes after initial detection of this anomalous temperature.
Or 70°C or higher is detected for 5 seconds continuously. (SRK
series removes)
-45(-55)°C or lower is detected for 5 seconds continuously 3
times within 40 minutes after initial detection of this anomalous
temperature.
Or -45(-55)°C or higher is detected for 5 seconds continuously
within 20 seconds after compressor ON.
-50(-55)°C or lower is detected for 5 seconds continuously 3
times within 40 minutes after initial detection of this anomalous
temperature.
Or -50(-55)°C or lower is detected for 5 seconds continuously
within 20 seconds after compressor ON.
-10(-25)°C or lower is detected for 5 seconds continuously 3
times within 40 minutes after initial detection of this anomalous
temperature.
-50°C or lower is detected for 5 seconds continuously 3 times
within 40 minutes after initial detection of this anomalous
temperature.
0V or lower or 3.49V or higher is detected for 5 seconds
continuously 3 times within 40 minutes after initial detection of
this anomalous pressure.
-50°C or lower is detected for 5 seconds continuously 3 times
within 40 minutes after initial detection of this anomalous
temperature.
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'12 • PAC-T-173
Error detecting timing