MXZ-SM42NAMHZ Service Manual

109
OCH789
8-2. REMOTE CONTROLLER DIAGNOSIS
For the detailed procedure, refer to the remote controller's manuals.
8-3. REMOTE CONTROLLER TROUBLE
For the troubleshooting, refer to the remote controller's manuals.
8-4. THE FOLLOWING SYMPTOM DO NOT REPRESENT TROUBLE (EMERGENCY)
Symptom Display of remote controller CAUSE
Even the cooling (heating)
operation selection button
is pressed, the indoor unit
cannot be operated.
"Cool (Heat)" blinks The indoor unit cannot cool (Heat) if other indoor units are
heating (Cooling).
The auto vane runs freely. Normal display Because of the control operation of auto vane, it may change
over to horizontal blow automatically from the downward blow
in cooling because the downward blow operation has been
continued for 1 hour. At defrosting in heating, hot adjusting and
thermostat OFF, it automatically changes over to horizontal
blow.
Fan setting changes during
heating.
Normal display Ultra-low speed operation is commenced at thermostat OFF.
Light air automatically change over to set value by time or
piping temperature at thermostat ON.
Fan stops during heating
operation.
"Heat Defrost
"
The fan stops during defrosting.
Fan does not stop while
operation has been
stopped.
Light out Fan runs for 1 minute after stopping to exhaust residual heat
(only in heating).
No setting of fan while start
SW has been turned on.
"Heat Standby
"
Ultra-low speed operation for 5 minutes after SW ON or until
piping temperature reaches 95°F [35°C]. Then low speed
operates for 2 minutes and operates at the normal set air
volume.
(Hot adjust control)
Indoor unit remote controller
shows “Please Wait"
indicator for about
2 minutes when turning
ON power supply.
“Please Wait” blinks The system is in the process of startup.
Operate remote controller again after “Please Wait” disappears.
Drain pump does not stop
while unit has been
stopped.
Light out After a stop of cooling operation, unit continues to operate drain
pump for 3 minutes and then stops.
Drain pump continues to
operate while unit has been
stopped.
—
Unit continues to operate drain pump if drainage is generated,
even during a stop.