Mitsubishi Electric LGH-F300RVX-E Handbook page 18

No. Problem
2 Though the remote
controller display
indicates the fan
is running, the fan
stops by itself.
3 The fan does not
stop even though
the remote control-
ler is operated to
stop operation.
4 Even though the
remote controller is
operated to change
the fan speed, the
fan speed does not
change.
5 The fan operation is
unstable.
6 Air volume is abnor-
mally large or small.
Factor
The Lossnay unit is operat-
ing in the protective mode
(intermittent operation).
The Lossnay unit is set to
the delay operation.
The interlocked air condi-
tioner (Mr. Slim indoor unit
or City Multi indoor unit) is
defrosting.
The system is switching the
ventilation mode.
The temperature around the
product is high.
The pre-heater or operation
monitor with delay operation
is set to be used.
The indoor negative pres-
sure setting or the indoor
positive pressure setting is
set.
The external fan speed input
is set. (CN17)
The external fan speed input
is set. (CN26)
The system is operating in
the protective mode (inter-
mittent operation).
The pre-heater is ON.
The motor rotation speed is
under control.
The model selection switch
(SW6) is not set correctly
after the circuit board is
replaced.
When PZ-61DR-E is used, it displays the icon " "
that indicates the protective operation is in-progress.
For details, see the Lossnay technical manual or
remote controller manual.
When PZ-61DR-E is used, it displays the icon " "
that indicates the delay operation is in-progress.
LED1 (green) on the control circuit board lights.
Lossnay operates in 30 minutes (or 15 minutes) after
the air conditioner is operated to run.
Check the function selection switch (SW5-1) on the
circuit board or the function setting (No. 9) of PZ-
61DR-E. (See the Lossnay technical manual.)
The supply fan has been stopped to prevent cold air
from blowing out. When the air conditioner finishes
defrosting, the fan operation is started automatically.
When switching the ventilation mode (Energy recov-
ery mode/Bypass mode), the fan stops (for approx.
30 seconds).
When the ambient temperature of the product is high
(higher than 104°F (40°C)), the fan may stop to pre-
vent the fan motor from overheating.
If the pre-heater or operation monitor with delay op-
eration is set to be used, the fan continues operating
for three minutes after the stop operation. Check the
function selection switches (SW2-8 and 5-6) on the
circuit board or the function settings (No. 57 and 58)
of PZ-61DR-E. (See the Lossnay technical manual.)
Check the function selection switches (SW2-4 and
2-5) on the circuit board or the function settings (No.
6 and 7) of PZ-61DR-E.
(See the Lossnay technical manual.)
When PZ-61DR-E is used, it displays the icon " ".
Check the fan speed switching input (CN17).
When PZ-61DR-E is used, it displays the icon " ".
Check the function selection switches (SW2-3 and
2-6) on the circuit board or the function setting (No.
63) of PZ-61DR-E.
(See the Lossnay technical manual.)
When PZ-61DR-E is used, it displays the icon " "
that indicates the protective operation is in-progress.
For details, see the Lossnay technical manual or
remote controller manual.
When the pre-heater is ON, Lossnay runs at Fan
speed 2 or higher speed. Even when Fan speed 1
is selected with the remote controller or external fan
speed input, Lossnay runs at Fan speed 2.
This product controls the motor by detecting the mo-
tor rotation speed. The fan operation may be unsta-
ble during rotation speed control (for maximum about
10 minutes).
Make the SW6 setting appropriate for the model.
(See chapter 8. (8) Setting status record (page 48).)
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Corrective action