Daitsu FDLA-09, Installation, Operation & Service Manual

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AUTOMODE
Auto cool/heat/heat with electric heater as booster
Every time the unit is turned on, MTV1 is on, AUX1, AUX2 and fan are off. MTV2 and heater are always off.
After 120secs, the subsequent operation mode is decided according to the following programs:
a) If the coil temperature sensor (Ti1) ≥ 36ºC, then MTV1, AUX1 and fan turn on or off according to HEAT mode.
b) If Ti1 < 36ºC, then MTV1, then AUX2 and fan turn on or off according to COOL mode.
Unit remains in AUTO COOL or AUTO HEAT mode throughout the operating cycle until the user changes the mode
manually or restarts the unit.
Should the Ti1 sensor be damaged, auto mode will not function.
Auto heat with electric heater as primary heat source / all configuration auto changeover
If current running mode is auto cool mode, then the control logic will change over to auto heat mode when all the
following conditions are met:
a) Ts ‐ Tr ≥ 1.0°C (or 4 ºC if economy contact is activated)
b) MTV1 has stop ≥ 10 min.
If current running mode is auto heat mode, then the control logic will change over to auto cool mode when all the
following conditions are met:
a) Tr ‐ Ts ≥ 1.0°C (or 4 ºC if economy contact is activated)
b) MTV1 has stop ≥ 10 min.
Note: Auto cool or auto heat operation are the same as cool or heat mode respectively.