Mitsubishi Daiya SRK50HA User Manual page 24

(c) Heating economy operation
The indoor unit fan operates 2ºC lower than the set temperature at speed 3.
(d) Blow economy operation
The indoor fan is controlled as follows.
OFF
Set temp
(21) Self diagnosis function
When something abnormal happens on the outdoor unit, indoor unit fan motor and each sensor (heat exchanger, room tempera-
ture,) it will be indicated by flashing lamps.
(a) Abnormality of outdoor unit:
S 50, 56 models
1) Cooling operation
When the indoor heat exchanger temperature does not fall to 25ºC or below for 40 minutes after 5 minutes have elapsed since
the compressor operation start, the abnormality stop occurs. (The timer lamp flashes 5 times.)
2) Heating operation
1 The indoor heat exchanger temperature < 5ºC for 5 minutes and more
The unit is stopped due to the outdoor unit abnormality excepting the defrost operation time. (The timer lamp flashes 5
times.)
2 5ºC
indoor heat exchanger temperature < 30ºC for 40 minutes and more
When the indoor heat exchanger temperature does not rise to 30ºC or over for more than 40 minutes after 5 minutes have
elapsed since the compressor operation start, the abnormality stop occurs. However, when the indoor fan began operation
once, this function is not activated until the unit is stopped or the mode is changed. (The timer lamp flashes 5 times when
20 minutes have elapsed.)
S 40 models
TIMER lamp will flashing when 5 minutes after it has been operated with the compressor ON (52ºC ON) the temperature on
heat exchanger thermistor will not go below 25ºC for more than 20 minutes for cooling and will not go over 30ºC for more
than 20 minutes for heating.
(The compressor will stop when cooling more than 20 minutes after flashing of the lamp, or heating above 25ºC abe below
30ºC.)
(b) Abnormality of indoor fan motor:
S 50, 56 models
When the status that the fan motor speed is 300 rpm or under continues for 30 seconds or more during the indoor fan motor
operation, the unit is stopped. The fan motor operation is restarted after 10 seconds, however, if the fan is stopped again, the
air-conditioner is completely stopped as the indoor fan motor abnormality and the abnormality indication is displayed. (The
operation lamp flashes 6 times.)
S 40 Model
The indoor fan motor revolves at a rate under 300 rpm for 30 seconds or longer, the RUN lamp will flash.
(c) Abnormality of heat exchanger thermistor:
RUN lamp will flashing when the input temperature of the heat exchanger thermistor measures less than –20ºC for more than
2 minutes (40 : 3 seconds) with the air-conditioner "OFF". (will not flashing during operation)
(d) Abnormality room temperature thermistor:
RUN lamp will flashing when the input temperature of the room temperature thermistor measures less than –20ºC for more
than 3 seconds with the air-conditioner "OFF". (will not flashing during operation)
Note (1) If the above abnormalities happen concurrently, the lamp will flashing in the order of item number (a) through (d) above.
24
1st speed
+1 +2