[5-2 Outdoor Unit Control ]
- 97 -
HWE14040
GB
5 Cont
rol
(3) Stopping the defrost operation
The defrost cycle ends when 12 minutes have passed since the beginning of the cycle, or when the pipe temperature (TH3)
has been continuously detected for 4 minutes (when SW4 (916) is set to OFF) or 2 minutes (when SW4 (916) is set to ON)
that exceeds the values in the table below.
The defrost cycle will not end for two minutes once started unless one of the following conditions is met : Pipe temperature
reaches 25°C [77°F] and SW4 (916) is set to OFF OR
*1
=25+TH7°C [77°F+TH7] and SW4 (916) is set to ON.
*1 (5°C [41°F]
25°C [77°F]).
In the multiple-outdoor-unit system, defrosting is stopped on all units at the same time.
(4) Problems during defrost operation
If a problem is detected during defrost operation, the operation will be stopped, and the defrost prohibition time based on the
integrated compressor operation time will be set to 20 minutes.
(5) Change in the number of operating indoor units during defrost operation
Even when there is a change in the number of operating indoor units during defrost operation, the operation will continue, and
an adjustment will be made after the completion of the defrost operation.
Defrost operation will be continued, even if the indoor units stop or under the Thermo-OFF conditions until it has run its course.
5-2-8
Continuous heating mode control
(1) Continuous heating mode start conditions
Continuous heating mode will start when all the conditions listed in the table below are met (outside temperature, cumulative
compressor operation time, and piping temperature).
SW4 (848) must be set to ON to perform Continuous heating mode.
(2) Valve operation during Continuous heating cycle
Model
TH3
SW4 (916) OFF
SW4 (916) ON
P200 -P250 models
10°C [50°F]
5°C [41°F]
P300 - P500 models
7°C [45°F]
5°C [41°F]
Outside temperature (TH7)
2.0 °C [35.6 °F] to 7.0 °C [44.6 °F]
Cumulative compressor operation
time
After 10 minutes at 2.0 °C [35.6 °F] to 3.5 °C [38.3 °F] has elapsed
After 20 minutes at 3.6 °C [38.5 °F] to 7.0 °C [44.6 °F] has elapsed
Evaporating temperature (Te)
After 3 minutes at 0°C [32°F] to -25 °C [-13°F] has elapsed
Top (right) HEX in defrost cycle
Bottom (left) HEX in defrost cycle
Outdoor unit fan
In operation
In operation
SV1a
OFF
SV5b
OFF
SV9
OFF
SV10
OFF
ON
SV11
ON OFF
21S4a,b,c
ON
Содержание PUHY-P1000
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Страница 40: ... 2 6 System Connection Example 31 HWE14040 GB 2 Restrictions ...
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Страница 171: ... 6 11 Standard Operation Data Reference Data 162 HWE14040 GB ...
Страница 243: ... 7 9 Error Code Definitions and Solutions Codes 7000 7999 234 HWE14040 GB ...
Страница 295: ... 8 13 Troubleshooting Problems Using the LED Status Indicators on the Outdoor Unit 286 HWE14040 GB ...
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