Daitsu FDLA-09, Installation, Operation & Service Manual

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SK2018 GLOBAL FDLA-V/P-AC-001
PRE-HEAT
Pre-heat without electrical heater
a)
If Ti1 < 36ºC [or < 28ºC is selected by DIPB-S2 position SW4], then MTV1 and AUX1 are turned on, indoor fan remains off.
b) If Ti1 ≥ 38 ºC [or ≥ 30ºC is selected by DIPB-S2 position SW4], then MTV1 and AUX1 are turned on, indoor fan runs at set
speed.
c) If the indoor coil temperature sensor is damaged, then pre-heat time is set for 2 minutes. Indoor fan runs at set speed.
Pre-heat with electrical heater
a)
Indoor fan will turn on after the electrical heater has been turned on for 10 seconds.
POST-HEAT
Post-heat without electrical heater
a)
If Ti1 ≥ 38ºC, then MTV1 and AUX 1 are off, then indoor fan continues to run at set speed.
b) If 36 ºC ≤ Ti1 ≤ 38ºC, then MTV1 and AUX1 are turned off. Then indoor fan maintains its original state.
c) If Ti1 < 36ºC, then MTV1 and AUX1 are turned off. Then indoor fan repeatedly runs for 30 seconds and then stops for 3
minutes.
d) If the indoor coil temperature sensor is damaged, then post-heat time is set for 3 minutes. Indoor fan runs at set speed.
Post-heat with electrical heater
a)
Indoor fan will shut down after the unit has been turned off for 20 seconds.
OVER-HEAT PROTECTION OF INDOOR COIL
a) If Ti1 ≥ 75ºC, then MTV1 and AUX1 are turned off. Indoor fan remains on and runs at high speed.
b) If Ti1 < 70ºC, then MTV1 and AUX1 are turned on. Indoor fan remains on and runs at set speed.
c) If the indoor coil temperature sensor is damaged, then the protection mode will be overridden and the unit will work
according to the pre-heat and post-heat program.
DEHUMIDIFICATION MODE
a) MTV2, AUX1 and heater are always off.
b) If Tr ≥ 25ºC, then MTV1 and AUX2 will be ON for 3 minutes, and then OFF for 4 minutes.
c) If 16 ºC ≤ Tr < 25ºC, then MTV1 and AUX2 will be ON for 3 minutes, and then OFF for 6 minutes.
d) If Tr < 16ºC, then MTV1 and AUX2 will be turned off for 4 minutes.
e) At the end of the above dehumidification cycle, the system will decide the next dehumidification control option. Indoor
fan will run at low speed throughout the dehumidification process.
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 Logics 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 Logics 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.