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23
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(16) Heating Low Outdoor Temperature Protective Control (50 type only)
◆ <I>
(a) Operating Conditions: When the outdoor air thermistor (Th5) temperature is 4ºC or lower continues for 5 minutes while
the outdoor speed is other than 0 rps.
(b) Operation Content: When the command speed is less than 22 rps, the command speed is forcibly set at 22 rps.
(c) Reset Conditions: When the outdoor air thermistor (Th5) temperature becomes 6ºC or higher.
◆ <II >
(a) Operating Conditions: When the outdoor air thermistor (Th5) temperature is 0ºC or lower continuously for 5 minutes
while the outdoor speed is other than 0 rps.
(b) Operation Content: The outdoor fan motor speed is raised to the next higher speed. (Upper limit 2nd speed)
(c) Reset Conditions: When the outdoor air thermistor (Th5) temperature becomes 2ºC or higher.
◆ <III>
(a) Operating Conditions: When the temperature sensed by the outdoor heat exchanger thermistor (Th4) becomes –10ºC or
lower continuously for 1 minute.
(b) Operation Content: When the command speed upper limit is set at 70 rps.
(c) Reset Conditions: When the temperature sensed by the outdoor heat exchanger thermistor (Th4) becomes -7ºC or
higher.
(17) Stop mode
(a) Operating conditions: When the operation mode is changed, when the dehumidifying operation is changed from the
heating oriented mode to the cooling oriented mode or vice versa, or when the inverter speed turns to 0 rps. [When 0 rps is
commanded from the indoor unit controller, or when an outdoor protective function is actuated]
(b) Detail of operation
◆ SRK25ZD-S, 35ZD-S
When stopped by indoor unit controller When stopped or reset by outdoor unit protective function
Function Operation
Heating, heating Cooling, cooling Heating, heating Cooling, cooling
oriented dehumidifying oriented dehumidifying oriented dehumidifying oriented dehumidifying
Stop Full stop Stop Full stop Stop Restart Stop Restart
(0 rps command) (0 rps command) (0 rps command) (0 rps command)
Inverter
speed
Indoor
fan
Indoor
power
relay
Outdoor
fan
4-way
valve
(Command
speed)
0
(Speed
dependent)
OFF
ON
OFF
3 min.
(1)
3 min.
(1)
2 min. 2 min.
55 sec. 55 sec.
Hot keep
2 min.55sec.
ON
OFF
ON
OFF
1st speed