Symptoms That Do Not Signify Problems - Mitsubishi Electric PURY-P200 Service Handbook

[6] Symptoms that do not Signify Problems

Symptom
Indoor unit does not run while oper-
ating for cooling (heating).
Auto-vane runs freely.
Air speed setting switches over freely
during heating operation.
Fan stops during heating operation.
Fan does not stop while stopping op-
eration.
Air speed does not attain the set
value even though turning operation
switch to "ON."
Outdoor unit does not run while start-
ing operation.
The display shown right will appear
on the indoor unit remote controller
for about 5 minutes when the main
power source is turned on.
Drain pump does not stop while the
operation is stopped.
Drain pump runs even during unit
stopping.
Remote controller display
"COOL (HEAT)"
blinking display
Normal display
Normal display
Defrosting
Extinguished
Preparing heating
Normal display
"HO" blinking display
Extinguished
- 113 -
Cause
Unable to execute cooling (heating) operation while
other indoor unit is under cooling (heating) operation.
Because of the control action of the auto-vane, hori-
zontal blow may be commenced automatically one
hour after using for down blow in cooling. Horizontal
blow will also be commenced at defrosting under heat-
ing, at the time of the hot adjust and the thermostat
off.
Very low speed operation is commenced at thermo-
stat OFF.
At thermostat ON, the very low speed operation au-
tomatically changes over to the set value by the time
or piping temperature.
Fan stops under defrosting operation.
When the auxiliary heater is turned on, fan operates
for one minute after stopping to remove residual heat.
Very low speed for 5 minutes after SW "ON" or until
the piping temperature reaches 35˚C.
Thereafter, the set value is commenced after low
speed for 2 minutes.
(Hot adjust control)
When outdoor unit is cooled down with refrigerant
stagnated, operate the compressor for 35 minutes
maximum to warm up. (model 200)
Fan operation will be done during the warming up.
The system is under starting up.
Operate the remote controller after the blinking of "HO"
is disappeared.
At stopping of cooling operation, drain pump oper-
ates for 3 minutes further.
Run drain pump if drain water is generated even un-
der stopping.