Toshiba ESTIA HWS-1501CSHM3-E, Service Manual

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59
8-3.
Hydro Unit Control 1-2) High temperature release control
A heat pump operation is performed as shown in the table below according to the TC sensor detecting temperature.
• For the detected temperature, TC (= TWO + 2 degree) of a heat pump operation is used. The values of T7 through
T10 varies depending on TWI. (See the table below)
• If the compressor frequency instruction from the hydro unit is less then 10 Hz, the compressor stops.
• TC > 62°C causes the compressor to stop abnormally. When the compressor restarts 140 seconds after the stop
and TC > 62°C is not detected for 20 minutes, the abnormal stop counter is cleared. 10 times of compressor
abnormal stop stops the operation of heat pump, and fault code A11 is displayed on the remote controller.
* If the heat pump operation is switched to other operation, the abnormality detection counter is reset to 0.
TC=TWO+2degree (°C)
1-3) Low temperature release control
A heat pump operation is performed as shown in the table below according to the TC sensor detecting temperature.
• For the detected temperature, TC = TWO of a heat pump operation is used. The values of T7 through T10 varies
depending on TWI. (See the table below)
• If the compressor frequency instruction from the hydro unit is less then 10 Hz, the compressor stops.
• TC < 3°C causes the compressor to stop abnormally. When the compressor restarts when 140 seconds has
passed after the stop and TC < 3°C is not detected for 20 minutes, the abnormal stop counter is cleared. 10 times
of compressor abnormal stop stops the operation of heat pump, and fault code A11 is displayed on the remote
controller.
* If the heat pump operation is switched to other operation, the abnormality detection counter is reset to 0.
TC=TWO (°C)
Item Operation flow and applicable data, etc.
T11
(62.0°C)
TC (TWO+2)
Forcible stop
O (down)
P (slow down)
Q (keep)
R2 (slow up)
R1
(slow up)
S (normal)
T9
T10
T8
T7
Zone Control operation
R1 Increase compressor frequency by 1.2 Hz every
60 sec.
R2 Increase compressor frequency by 0.6 Hz every
60 sec.
O Decrease compressor frequency to 70% every
10 sec.
P Decrease compressor frequency by 3 Hz every
10 sec.
Q Keep compressor frequency.
TWI T7 T8 T9 T10 T11
TWI<30 57.0 59.0 60.0 61.0 62.0
30 TWI<35 57.0 59.0 60.0 61.0 62.0
35 TWI<40 56.5 58.5 59.5 60.5 62.0
40 TWI<45 56.5 58.5 59.5 60.5 62.0
45 TWI<50 56.0 58.0 59.0 60.0 62.0
50 TWI 56.0 58.0 59.0 60.0 62.0
T7
Forcible stop
O (down)
P (slow down)
Q (keep)
R2 (slow up)
R1
(slow up)
S (normal)
T9
T8
T10
T11
TC (TWO)
Zone Control operation
R1 Increase compressor frequency by 1.2 Hz every
60 sec.
R2 Increase compressor frequency by 0.6 Hz every
60 sec.
O Decrease compressor frequency to 70% every
10 sec.
P Decrease compressor frequency by 3 Hz every
10 sec.
Q Keep compressor frequency.
TWI T7 T8 T9 T10 T11
TWI<10 10.0 8.0 6.0 4.0 3.0
10 TWI<15 10.5 8.5 6.5 4.5 3.0
15 TWI<20 11.0 9.0 7.0 5.0 3.0
20 TWI 11.5 9.5 7.5 5.5 3.0