Display Sequence Of Error Codes Or Inspection Indicator Lamps; Occurrence Of One Kind Of Error; Error Detecting Timing - Mitsubishi Heavy Industries SRK20ZSX-W Service Manual

(iii) 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
control
• Displays the error of higher priority (When plural errors are persisting)
Red LED on indoor unit
control PCB
• Displays the present errors. (When a new error has occurred after the former error was reset.)
Red LED on outdoor unit
main 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
Outdoor
Discharge pipe temperature
sensor anomaly
Suction pipe temperature
sensor anomaly
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 control 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.
-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.
-55°C or lower is detected for 5 seconds continuously 3 times
within 40 minutes after initial detection of this anomalous sensor.
Or -55°C or higher is detected for 5 seconds continuously within
20 seconds after power ON.
-55°C or lower is detected for 5 seconds continuously 3 times
within 40 minutes after initial detection of this anomalous sensor.
Or -55°C or lower is detected for 5 seconds continuously within
20 seconds after power ON.
-25°C or lower is detected for 5 seconds continuously 3 times
within 40 minutes after initial detection of this anomalous sensor.
-55°C or lower is detected for 5 seconds continuously 3 times
within 40 minutes after initial detection of this anomalous sensor.
Or -55°C or higher is detected for 5 seconds continuously within
20 seconds after power ON.
102
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'19 • SCM-SM-276
Error detecting timing