Hitachi RAS-(2-6)HVNP1(E), Руководство по обслуживанию

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6 Optional functions
181
SMGB0087 rev.0 - 12/2013
6
Intermittent Operation of Outdoor Fan Motor (
F1
)(RAS-(4-6)H(V)NC1E only)
Press “PSW1” and select the setting condition “0” to “4” in Intermittent Operation of Outdoor Fan Motor “
F1
” or set the
control function No. of the external input setting to “4”, so the function can be set. This function is utilized for protection from
snow (optional function). While this function is activated, the outdoor fan motor starts intermittent operation at an outdoor
temperature of 10
o
C or less during outdoor unit stoppage (compressor stoppage), or stops the operation at 16
o
C or more.
When the compressor restarts operation, the outdoor fan motor operates in the normal mode.
Fan Motor Operation
A [s]
Fan Motor Stop
600 [s]
Contents of Function Setting
Item “
F1
”
0 1 2 3 4
Outdoor Fan Motor Operation Time
A [s]
600
(Continuous
Operation)
30 60 120 300
N O T E
• This is an auxiliary function to protect the unit from snow. In snowy regions, make sure to protect the unit with a snow-
prevention roof, fence or snow-prevention hood (Field-Supplied), etc.. Otherwise, abnormal vibrations due to imbalan-
ced propeller fan will be caused.
• If the fan motor or fan controller fail during the outdoor fan motor intermittent operation, stop all the outdoor fan motor to
suspend the operation. Check the alarm code and deal properly with the failure next time the compressor is operated.
D A N G E R
Because of this setting, the outdoor fan can operate even while the outdoor unit (compressor) stops. Display a
notice to that effect on a readily visible part of the unit body, in order to avoid injuries caused by an unintended
outdoor fan operation.
Defrost control in demand mode (4-12 HP premium) (
F1
)
Press “PSW1” and select the setting condition “1” at the defrost control in demand mode.
Compressor heater control mode (
F3
)
Factory setting “0”. While the system is in stand-by mode, the crankcase heater will ensure the oil condition to start at any
time. This control mode causes additional crankcase heater input while the system is not expected to start.
Press “PSW1” and select the setting condition “1” at the Compressor heater control mode. The crankcase heater will be
switched off every time that the system is turned to stand-by mode, saving its input while system operation is not required.
N O T E
When starting up the system again, it will remain in thermo-off mode until compressor oil becomes ready for the start of
operation. It is not recommended to use this control mode when immediate system starting is expected. The preparation
time for the starting will never exceed 4 hours.