Mitsubishi Heavy Industries FDT200VSAWPVH Service Manual page 19

(c) Operation check mode
There is no communication with the outdoor unit but it allows performing operation in respective modes by operating
the remote control.
(d) Drain pump test run mode
As the drain pump test run is established, the drain pump only operates and during the operation protective functions by
the microcomputer of indoor unit become ineffective.
(14) Cooling, dehumidifying frost protection
(a) To prevent frosting during cooling mode or dehumidifying mode operation, the compressor-OFF if the indoor heat
exchanger temperature (detected with Thi-R) drops to 1.0 °C or lower at 4 minutes after the compressor-ON. If the
indoor unit heat exchanger temperature is 1.0 °C or lower after 5 minutes, the indoor unit is controlled compressor-OFF.
If it becomes 10°C or higher, the control terminates.
• Frost prevention temperature setting can be selected with the
indoor unit function setting of the wired remote control.
Item
Temperature - Low (Factory default)
Temperature - High
• Compressor forced off temperature (FDT&FDTC only)
Hs > 50%
Item
Low
Symbol
A
(b) Selection of indoor fan speed
If it enters the frost prevention control during cooling operation (including dehumidifying), the indoor fan speed is
switched.
(i) When the indoor return air temperature (Thi-A) is 18°C or higher and the indoor heat exchanger temperature (detected
with Thi-R) detects the compressor frequency drop start temperature A°C+1°C, indoor fan speed is increased by
20min .
-1
(ii) If the phenomenon of (i) above is detected again after the acceleration of indoor fan, indoor fan speed is increased
further by 20min
Note (1) Indoor fan speed can be increased by up to P-Hi.
(15) Heating overload protection
(a) If the indoor heat exchanger temperature (detected with Thi-R) at 63°C or higher is detected for 2 seconds continuously,
the compressor stops. When the compressor is restarted after a 3-minute delay, if a temperature at 63°C or higher is
detected for 2 seconds continuously within 60 minutes after initial detection and if this is detected 5 times consecutively,
the compressor stops with the anomalous stop (E8). Anomalous stop occurs also when the indoor heat exchanger
temperature at 63°C or higher is detected for 6 minutes continuously.
(b) Indoor fan speed selection
If, after second detection of heating overload protection up to fourth, the indoor fan is set at below Hi when the
compressor is turned ON, the indoor fan speed is increased by 1.
(16) Anomalous fan motor
(a) After starting the fan motor, if the fan motor speed is 200 min
times within 60 minutes, then fan motor stops with the anomalous stop (E16).
(b) If the fan motor fails to reach at -50 min
(E20).
Symbol
A
1.0
2.5
Hs ≦ 50%
High
Symbol
1.0 2.5 A
.
-1
Compressor ON
56
Indoor heat exchanger temperature (°C)
-1
(FDU:-500 min
Compressor-OFF
Item
Low High
-0.5 1.0
Compressor OFF
63
-1 or less is detected for 30 seconds continuously and 4
-1
) less than the required speed, it stops with the anomalous stop
18
- -
'21 • PAC-SM-383
Compressor-ON capable
5 minutes
timer
A 10
Indoor heat exchanger temperature (°C)
Model
SRC4
FDC10