Panasonic 26PEK2U6 26PEK2U6 Service Manual - Page 210

2. Processes and functions 2-2. Cold Draft Prevention (Heating Cycle) The cold draft prevention function controls indoor fan speed so a strong draft of cold air will not blow out before the indoor heat exchange coils have warmed up. STANDBY shows on the remote controller when the indoor fan speed is LL (very low) or OFF. This condition occurs in the following 3 cases: • During Thermo OFF (refer to 2-1 B. Room Temperature Control, Heating) • During the defrosting operation (refer to the section "Defrost Control" on page 2-8) • Until either the coil temperature E2 reaches 72°F(Type F2, T2) or 68°F(Type U2) or 81°F(Type U1,K1,T1,F1, K2) or when a maximum of 6 minutes have passed. The indoor fan motor operates in L instead of LL for 3 seconds as it starts to give the fan an initial boost. Type
F2,T2 U2 U1,K1,T1,F1,K2 79 75 92 75 72 88 INDOOR UNIT COIL TEMP. E2 (°F) 72 68 81 MAX. 6 MINUTES 2 68 64 77 50 46 50 SET AUTO OR H LL LL/OFF LL FAN SPEED M LL LL/OFF LL L LL LL/OFF LL "STANDBY" INDICATOR "STANDBY" APPEARS LL= Very low speed L= Low speed L M H L M M L L L M= Medium speed H= High speed 1135_THS_I Fig. 3 Chart Summary and Explanations The main idea of this chart is to show that the indoor fan speed increases and gets closer to the set fan speed as the coil temperature E2 rises. The indoor unit's coil temperature is taken from sensor E2 located in the middle of the indoor heat exchange coil. The dotted line shows that the indoor fan motor is OFF. When the temperature at sensor E2 falls below 50 ˚F, the indoor fan motor stops running. 2-4