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 FDT71VNXWVH Service 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)
control
Red LED on indoor unit
control PCB
Red LED on outdoor unit
• Displays the present errors. (When a new error has occurred after the former error was reset.)
control PCB

■ Error detecting timing

Section Error description
Drain trouble (Float switch
activated)
Communication error at
initial operation
Remote control
communication circuit error
Communication error during
operation
Indoor
Excessive number of
connected indoor units by
controlling with one remote
control
Return air temperature sensor
anomaly
Indoor heat exchanger
temperature sensor anomaly
Outdoor air temperature
sensor anomaly
Outdoor heat exchanger
temperature sensor anomaly
Discharge pipe temperature
Outdoor
sensor anomaly
Suction pipe temperature
sensor anomaly
Low pressure sensor anomaly
Compressor under dome
temperature sensor anomaly
Category of display
Error code
Whenever float switch is activated after 30 seconds had past since
power ON.
No communication between indoor and outdoor units is
" "
WAIT
established at initial operation.
Communication between indoor unit and remote control is
interrupted for more than 2 minutes continuously after initial
communication was established.
Communication between indoor and outdoor units is interrupted
for more than 2 minutes continuously after initial communication
was established.
Whenever excessively connected indoor units is detected after
power ON.
-50°C or lower is detected for 5 seconds continuously within 60
minutes after initial detection of this anomalous temperature.
-50°C or lower is detected for 5 seconds continuously within 60
minutes after initial detection of this anomalous temperature.
Or 70°C or higher is detected for 5 seconds continuously
-45°C or lower is detected for 5 seconds continuously 3 times
within 40 minutes after initial detection of this anomalous
temperature.
Or -45°C or lower is detected for 5 seconds continuously within
20 seconds after compressor ON.
-50°C or lower is detected for 5 seconds continuously 3 times
within 40 minutes after initial detection of this anomalous
temperature.
Or -50°C or lower is detected for 5 seconds continuously within
20 seconds after compressor ON.
-10°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 4.0V 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.
52
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'19 • PAC-SM-332
Error detecting timing