Toshiba Estia RUA-CP1701H, Руководство по обслуживанию

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Monobloc Outdoor Unit Service Manual
67
8.4.6.3. Forced defrost logic
In cases where ice regularly remains after a defrost, parameter 615 “Forced Defrost” can be activated:
•
If unsuccessful defrost

Te threshold = 18 °C after defrost

counter = 1
•
Go back in normal heating mode
•
If new detection of unsuccessful defrost (Te > 18°C)

counter = 2
•
Go back in heating mode for 10 min
•
Forced Defrost
•
If forced defrost is OK (Te > 18°C) counter = 0, else counter = 1
•
Parameter 615 with forced defrost logic, implemented in SR 3.1 (and more recent) version with
default value = 0
•
If defrost issue met on field

set P. 615 = 1
8.4.7. Outdoor fan control
Control of fan revolution number and the fan taps in this unit are shown below.
Tap (W_hex)
Fan (rpm)
W1 W2 W3 W4 W5 W6 W7 W8 W9 WA WB WC WD WE WF
17
Upper 0 0 150 200 260 300 400 450 550 630 670 820 820 820 910
Lower 200 200 200 220 240 280 380 500 530 610 640 780 780 780 890
21
Upper 240 250 250 300 350 410 470 530 590 640 710 770 810 850 920
Lower 250 280 280 340 400 460 520 580 640 710 760 830 860 920 940
8.4.7.1. Cooling mode
Cooling operations of the fans are controlled by a TL sensor, TO sensor and the compressor revolution
number. Control is performed per 1 tap of DC fan control.
The outdoor fan is controlled by every 1 tap of DC fan control (14 taps).
During startup, operation is fixed for 60 seconds to a maximum fan tap corresponding to the zones shown
in the tables below. Thereafter fan tap is controlled by a temperature outputted from the TL sensor.
17kW Cooling fan control
Temperature
Range
Compressor Speed Range
20 Hz or lower 20 Hz to 45 Hz 45 Hz or higher
Min. Fan
Speed
Max. Fan
Speed
Min. Fan
Speed
Max. Fan
Speed
Min. Fan
Speed
Max. Fan
Speed
38
℃≦
TO W6 WC W8 WD WA WD
29
℃≦
TO
＜
38
℃
W5 WB W7 WC W9 WC
15
℃≦
TO
＜
29
℃
W4 W8 W6 WA W8 WC
5
℃≦
TO
＜
15
℃
W3 W6 W5 W8 W7 WA
0
℃≦
TO
＜
5
℃
W2 W4 W4 W6 W5 W8
-4
℃≦
TO
＜
0
℃
W2 W3 W3 W5 W4 W6
TO
＜
-4
℃
W1 W2 W1 W4 W2 W6
TO sensor error W1 WC W1 WD W2 WD