Fresh Air Control (For Ar Type); External Electrical Control (For Ar Type); Drain Pump Operation (For Au, *Ar Type) - Fujitsu ASU18RMLQ Service Instruction

16. FRESH AIR CONTROL (For AR type)

The fan motor for Fresh Air is operated in synchronization with the indoor fan operation
as shown in Figure 11.
(Fig.11 : Fresh air control)
Operation
Fan motor
(Indoor unit)
Stop
Operation
Fan motor
(for Fresh Air)
Stop
17. EXTERNAL ELECTRICAL HEATER CONTROL (For AR type)
The external electrical heater is operated as shown in Figure 12.
(Fig.12 : External electrical heater control)
Ts -3°C
Ts -12°C
When the room
temperature drops
18. DRAIN PUMP OPERATION ( For AU, *AR type )
During Cooling / Dry operation
1. When the compressor starts, the drain pump starts simultaneously.
2. The drain pump operates continuously for 3 minutes after the compressor is turned off.
3. When the compressor stops by the "Indoor heat exchanger de-icing function", the drain pump is turned off in 1 hour
after the compressor stops.
4.When the water level in the drain pan rises up and then the float switch functions:
The compressor, indoor and outdoor fan motor operation are stopped.
1
Drain pump operates continuously for 3 minutes after the float switch is turned off.
2
(Almost condensing water may be drained)
5. When the float switch turns ON continuously for 3 min., "FAILURE INDICATION" operates.
6. When the float switch turns OFF within 3 min., the unit starts cooling operation.
During Heating / Fan / Stop operation
1.When the water level in the drain pan rises up and then the float switch functions:
Drain pump operates continuously for 3 minutes after the float switch is turned off.
1
(Almost condensing water may be drained)
2. When the float switch turns ON continuously for 3 min., "FAILURE INDICATION" operates.
*When installed the drain pump which procured locally, it operates
When the room
temperature rises
Heater : OFF
Heater : ON
Heater : OFF
01-17
Ts : Setting temperature
Ts -1°C
When the compressor stop,
External electrical heater is OFF.
Ts -10°C