Daitsu FMCD*ECM series, Installation, Operation And Service Manual

Page: 29 / 62

Page 29 of 62
SK2014 ‐ SON ‐ 002 ‐ TechMnl ‐ FMCD ‐ 003
HEAT MODE
Without Electrical Heater
a) MTV1, AUX2 and electric heater are always off.
b) If Tr ≤ Ts ‐ 1ºC (or ‐ 4ºC if economy contact is activated), then heat operation is activated
and MTV2 and AUX1 are turned on. Indoor fan runs at the set speed.
c) If Tr > Ts, then heat operation is terminated and MTV2 and AUX1 are turned off. Indoor fan
runs at 200RPM.
d) The range of Ts is 16 ‐ 30ºC.
e) Indoor fan speed can be adjusted to low, medium, high and auto.
f) When turned on, MTV2 requires 30 seconds before it is fully open.
g) When turned off, MTV2 requires120 seconds before it is fully closed.
With Electrical Heater as Booster
a) MTV1 and AUX2 are always off.
b) If Tr ≤ Ts ‐ 1ºC (or – 4ºC if economy contact is activated), then heat operation is activated
and MTV2 and AUX1 are turned on. Indoor fan runs at the set speed.
c) If Tr > Ts, then heat operation is terminated and MTV2 and AUX1 are turned off. Indoor fan
runs at 200RPM.
d) If Ti1 < 40ºC, then the electrical heater is turned on. If 40ºC ≤ Ti1 < 45ºC, then the electrical
heater maintain its original state. If Ti1 ≥ 45ºC, then the electrical heater is turned off.
e) The range of Ts is 16 ‐ 30ºC.
f) Indoor fan speed can be adjusted to low, medium, high and auto.
g) When turned on, MTV2 requires 30 seconds before it is fully open.
h) When turned off, MTV2 requires120 seconds before it is fully closed.
PRE ‐ HEAT
Without Electrical Heater
a) If Ti1 < 36ºC [or 28ºC depending on DIP setting], then MTV2 and AUX1 are turned on. Indoor
fan runs at 200RPM.
b) If Ti1 ≥ 38ºC [or 30ºC depending on DIP setting], then MTV2 and AUX1 are turned on. Indoor
fan runs at set speed.
c) If indoor coil temperature sensor is damaged, then the pre ‐ heat time is set for 2 minutes.
Indoor fan runs at set speed.
Pre ‐ heat with Electrical Heater
a) MTV2 and AUX2 are turned on.
b) If the indoor fan speed ≥ 300RPM, then the electrical heater will turn on.
POST ‐ HEAT
Without Electrical Heater
a) If Ti2 ≥ 38ºC, then MTV2 and AUX 1 are turned off. Indoor fan continues to run at set speed.
b) If 36

F ≤ Ti2 ≤ 38

F, then MTV2 and AUX1 are turned off. Indoor fan maintain its original
state.
c) If Ti2 < 36ºC, then MTV2 and AUX1 are turned off. Indoor fan repeatedly runs for 30 seconds
and then stops for 3 minutes.
d) If the indoor coil temperature sensor is damaged, then the post ‐ heat time is set for 3
minutes. Indoor fan running at set speed.
With Electrical Heater
a) Indoor fan runs at 200RPM after the unit has been turned off for 20 seconds.