Daikin GYEQ20AN, Руководство по обслуживанию

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Actuator Control SiAUY361411EA
107 Control and Functionality
3.2 Pump Control
„
Cooling water pump
[All modes]
• The cooling water pump is always running while the unit is operating.
3.3 Fan Control
„
Fans
[Cooling, cooling main, heating main A]
• The fan speed is reduced when the high-side pressure is lower than the target high-side
pressure.
• The fan speed is increased when the cooling water temperature has risen beyond 90°C as the
result of reducing the fan speed.
• The fan speed is reduced when the unit enters the quiet mode.
[Heating, heating main B]
• When the low-side pressure is higher than the pressure set-point, the fan speed is controlled
to adjust the pressure.
• The fan speed is increased when the cooling water temperature has risen beyond 90°C as the
result of reducing the fan speed.
• The fans are stopped when defrosting is performed.
• The fan speed is reduced when the unit enters the quiet mode.
3.4 Heater Control
„
Compressor heater, oil return heater
[All modes]
• These heaters are always running (turned ON) while the system is stopped.
„
Oil separator heater, accumulator heater
[All modes]
• ON/OFF operation while stopped.
3.5 Starter Control
[All modes]
• If the engine speed reaches 800 min
-1
or higher as the result of turning ON the starter, then
the starter is turned OFF.
• If the engine speed is lower than 800 min
-1
with the starter turned ON, then the system
attempts to start the engine by turning ON/OFF the starter in the following cyclic pattern:
ON [10 seconds]
→
OFF [10 seconds]
→
ON [6 seconds]
→
OFF [10 seconds]
→
ON [6 seconds]
• If no speed pulse is detected within 3 seconds of turning ON the starter, the system waits for 4
minutes before the next attempt.
3.6 Compressor Clutch Control
[All modes]
• The compressor clutch is turned ON 3 seconds before the starter is turned ON.
• It is turned ON/OFF in accordance with step commands for capacity.