Toshiba HWS-803XWHM3-E Service Manual page 81

Item
8-4. 10) High pressure release control
Outdoor unit
1) To prevent excessive hi pressure rise, operation frequency is controlled by the TL sensor when cooling and by TWO
control sensor when heating.
2) If the TL sensor when cooling or the TWO sensor when heating detects an abnormal stop zone temperature, the
compressor stops and the abnormality detection counter increments.
3) When the compressor stops in 2), the operation restarts when the temperature returns to the usual operation zone
("e" or below) after 150 seconds.
4) When the compressor stops in 2), the abnormality detection counter is cleared when the operation continues for 10
minutes. If the counter counts 10 times, error code is displayed and the compressor does not restart.
5) For details about an check code displayed, see the check code list.
Heating TC
Cooling TL
[°C]
a
b
c
d
e
a
b
c
d
e
11) High pressure switch
The high pressure switch detects abnormal high pressure (higher than 4.15Mpa) in cooling cycle and protect the
compressor.
• The high pressure switch stops the compressor as the pressure in the cooling cycle becomes higher than 4.15Mpa.
• The compressor will restart three minutes after stopping.
• If the high pressure switch functions again after rest a rting, the compressor stops and the "A07" error code is
indicated.
12) Compressor case thermostat
The compressor case thermostat functions to protect the compressor when the blow-out temperature from the
compressor is too high.
• The compressor case thermostat on the upper part of compressor stops the compressor.
• The compressor will restart three minutes after stopping.
• If the compressor case thermostat functions again afte r restarting (functions at 125°C), compressor stops and the
"H04" error code is indicated.
13) Bottom plate heater control
13-1)Controllable models (Models equipped with the bottom plate heater (outdoor,3 phases, 400V) only)
• HWS-1403XWH**-E/HWS-1103H8R-E
• HWS-1403XWH**-E/HWS-1403H8R-E
• HWS-1403XWH**-E/HWS-1603H8R-E
13-2)Target to control
Control ON and OFF of the bottom plate heater using the outdoor temperature sensor (To).
To
+2
0
Operation flow and applicable data, etc.
Abnormal stop
Frequency normal down
Frequency slow down
Frequency hold
Frequency slow up
(up to the point instructed)
As instructed
803H-E
Heating Cooling
TC (TWO+2) TL
64°C 63°C
62°C 62°C
60°C 60°C
58°C 58°C
54°C 54°C
Bottom plate
heater is turned off
Bottom plate
heater is turned on
1103H-E, 1403H-E
Heating Cooling
TC (TWO+2) TL
64°C 63°C
62°C 62°C
60°C 60°C
58°C 58°C
54°C 54°C
80
1103H8(R)-E, 1403H8(R)-E, 1603H8(R)-E
Heating Cooling
TC (TWO+2) TL
62°C 63°C
59°C 62°C
57°C 60°C
52°C 58°C
51°C 54°C