Mitsubishi Electric 500YEMK-A, Руководство по обслуживанию

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(4) The following events are not malfunctions (errors).
Event Remote controller display Cause
The indoor unit does not operate
even when the cooling or heating
system has been turned on.
The auto-vanes move automatically
The airflow speed setting changes
during heating operation.
The fan stops during heating
system operation.
The fan continues to operate even
after the system has shut down.
Airflow speed is not the set speed
when the system operation switch
is turned on.
Even when the system is
operating, the outdoor unit does
not operate.
“HO” blinks on the indoor unit
remote controller display for
approximately three minutes after
turning on the main power source.
The drain pump continues to
operate even after the system has
shut down.
The drain pump operates even
though the system has been shut
down.
The constant rate unit fan
operates while the constant rate
unit is shut down during operation
of the capacity control unit.
LEV2 and SV5b open while the
constant rate unit is shut down.
LEV1, SV4, LEV2, and SV5b open
while the constant rate unit is shut
down.
LEV1 opens while the constant
rate unit is operating.
“Cooler (heater)” blinks
Normal display
Normal display
Defrosting
Lights-out
Heating set up
Normal display
“HO” blinks
Lights-out
Normal display
Normal display
Normal display
Normal display
The cooling or heating system will not operate when the
system is operating in the opposite mode for another
indoor unit.
The auto-vane control system may automatically return
the vanes from the lowered position to the horizontal
position after 1 hour of cooling operation. The vanes also
automatically move to horizontal position while defrosting
during heating system operation, during hot adjust, and
when the thermostat turns off.
When the thermostat turns off, the airflow speed setting is
automatically changed to “slight”.
When the thermostat turns on, the airflow speed setting is
automatically changed from “slight” to the set airflow
speed based on time or piping temperature.
The fan stops during defrosting.
When the auxiliary electrical heater is on, the fan
continues to run for approximately 1 minute after
system operation ends to facilitate the dispersal of
residual heat.
The airflow speed setting is automatically changed to
“slight” either for 5 minutes after the switch has been
turned on or until the piping reaches a temperature of
35°C. Then, it is automatically changed to low for 2 min-
utes, after which it is automatically changed to the set
speed. (Hot adjust control)
If the refrigerant has accumulated in the outdoor unit due
to the low outside temperature, a warm-up operation is
performed for a maximum of 35 minutes to warm the
compressor. (If the outside temperature reaches 0°C or
lower, it could possibly take as long as 4 hours from the
time the power is turned on to the time operation begins.)
During this time, only the blower operates.
The system is starting up. After the blinking HO
disappears, operate from the remote controller.
The drain pump continues to operate for approximately 3
minutes after the cooling system operation has shut down.
The drain pump will operate at any time there is water in
the drain system, even if the system has been shut down.
The fan is operated in order to prevent the refrigerant from
accumulating in the constant rate unit.
In order to avoid excessive refrigerant being fed to the
capacity control unit, the solenoids are opened for a set
period of time. (Liquid correction control)
The solenoids are opened in order to maximize pressure
to compensate for a lack of capacity during heating
system operation.
The solenoid is opened to control excessive flow of
refrigerant to the constant rate unit during heating system
operation.