19
OPERATION WITH INDOOR CAPACITY OVERLOAD
When the operating combination ratio is > 120%, the outdoor unit transmits an overload operation signal to indoor units. All indoor
units* conduct the following operations until the running combination ratio < 105%:
• Enforced low speed for all operating indoor units except for the ones in fan mode.
• The maximum opening of the electronic expansion valves decreases to 1200P for 2000P (350P for the 500P).
It will never go to overload operation when the Heat Recovery system is in simultaneous heating and cooling mode.
* If the fourth code of SW1 is set to ON and the address is set to 63#, the Mode Priority indoor unit is excluded. Only one Mode
Priority indoor unit is allowed to exist in a refrigerant system.
Refer to the dip switch settings in Appendix A of the Indoor Unit Installation Manual.
LOCKING FUNCTION
Part of the indoor unit functions can be locked from the host computer, but the locking instruction affects the remote controller
because the indoor unit will keep its current status.
• Startup locking
If the startup function is locked, the indoor unit can only answer to the startup signal, and it ignores the shutdown signal from
the remote controller.
• Shutdown locking
If the shutdown function is locked, the indoor unit can only answer to the shutdown signal, and it ignores the startup signal
from remote controller.
• The lowest cooling temperature locking
The host computer locks the lowest setting temperature for space in cooling mode. Therefore, the cooling thermostat only
answers to the setting temperature, which is equal to or higher than the locked value. The locked value will be received instead
of the setting temperature, which is lower than it for the indoor unit.
• The highest heating temperature locking
The host computer locks the highest setting temperature for space in heating mode. Therefore, the heating thermostat only
answers to setting temperatures that are <
the locked value. The locked value will be received instead of the setting
temperature, which is higher than the one for the indoor unit.
• Fan speed locking
Locks the fan speed setting.
EEV AND FAN
Table 18 —Oil Recovery*
* For Heat Recovery systems, oil recovery in heating operation is the same as the defrost operation.
Operating Combination Ratio =
Total capacity index of the operating indoor units
Capacity index of the outdoor unit
OIL RECOVERY
MODE
BEFORE OIL RECOVERY
OIL RECOVERY OPERATING
2000P EEV 500P EEV
FAN
OPERATING MODE ENERGY DEMAND OPENING OPENING
Cooling Operation
OFF -- 0 1200P 300P OFF
Error -- 0 1200P 300P OFF
Fan -- 0 1200P 300P Keep unchanged
Cooling thermo-ON Cooling Not 0 SH control SH control Keep unchanged
Cooling thermo-OFF Cooling 0 1200P 300P Keep unchanged
Heating Operation *
Heating thermo-ON Heating Not 0 1504P 480P OFF
Heating thermo-OFF -- 0 1504P 480P OFF
Error -- 0 1504P 480P OFF
OFF -- 0 1504P 480P OFF
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