Mitsubishi Electric FDF100VSXVD Technical Manual page 108

12) Dewing prevention control
[Control condition] During cooling and dehumidifying operation, if all the following conditions are established, the
compressor speed (frequency) is reduced to prevent dewing and water splash.
[Control contents]
13) Refrigerant quantity shortage protection
Under the compressor protection start III control during cooling and dehumidifying operations, the following control is
performed by detecting the indoor unit heat exchanger temperature (Th
(Th -A).
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[Control condition]
[Control contents]
14) Broken wire detection on temperature thermistor and low pressure sensor
a) Outdoor unit heat exchanger thermistor, outdoor air thermistor and low pressure sensor
If the following is detected for 5 second continuously within 2 minutes to 2 minutes and 20 seconds after the
compressor ON, the compressor stops. After a delay of 3 minutes, it restarts but, if the same is detected repeatedly 3
times within 40 minutes, the compressor stops with the anomalous stop.
Note (1) During defrosting and for 3 minutes after the end of defrosting, it is not detected.
• Outdoor unit heat exchanger thermistor: -50°C or lower
• Outdoor air temperature thermistor: -45 or lower
• Low pressure sensor: 0V or under or 3.49V or over
b) Discharge pipe temperature thermistor, suction pipe temperature thermistor and underneath temperature thermistor
(model 200, 250 only)
If the following is detected for 5 second continuously within 10 minutes to 10 minutes and 20 seconds after the
compressor ON, the compressor stops. After a delay of 3 minutes, it restarts but, if the same is detected repeatedly 3
times within 40 minutes, the compressor stops with the anomalous stop.
Note (1) During defrosting and for 3 minutes after the end of defrosting, it is not detected.
• Discharge pipe temperature thermistor: -10°C or lower
• Suction pipe temperature thermistor: -50 or lower
• Underneath temperature thermistor: -50°C or lower
15) Fan motor error
a) If the fan speed of 100rpm or under is detected for 30 second continuously under the outdoor unit fan control (with
the operation command of fan tap at
b) When the fan motor speed drops to 100rpm or under 5 times within 60 minutes and the compressor stops, it enters
the anomalous stop mode with E48 displayed on the remote controller.
16) Anomalous stop by the compressor start stop
1) When it fails to shift to the compressor DC motor's rotor position defection operation at 5 seconds after establishing
the compressor start condition, the compressor stops temporarily and restarts 3 minutes later.
2) If it fails to shift to the position detection operation again at second time, it judges the anomalous compressor start
and stops the compressor by the anomalous stop (E59).
17) Anomalous compressor rotor lock (model 200, 250 only)
After shifting to the compressor rotor's position detection operation, if fails again to detect the rotor position, the
compressor stops.
Compressor restarts 3 minutes later but, if it is operated 4 times within 15 minutes, the anomalous stop (E60) occurs.
Cooling electronic expansion valve aperture (EEVC) is 500 pulses.
Suction overheat is 10°C or higher.
Compressor speed (frequency) is A rps or higher.
When the suction overheat is 10°C or higher, the compressor speed (frequency) is reduced at each
1 minute.
Compressor speed (frequency) does not rise till the cooling
expansion valve becomes 460 pulses.
This control takes A rps as its lower limit so that compressor
speed is not controlled when it is less than A rps.
When the state that the indoor unit heat exchanger temperature (Th
the indoor unit return air temperature (Th
It judges that the flowing of refrigerant in to the indoor unit is insufficient so that the compressor is
stopped and E57 is displayed on the remote controller.
speed or higher), the compressor stops.
-
-R) and the indoor unit return air temperature
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-A) by 4°C or more continues for 1 minute.
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107 -
'11 • PAC-T-160
A rps
Model
100~140 60
200, 250 60
-R) does not become lower than
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