Heating Standby - Panasonic U-8ME1E8E Service Manual

2. Heating Standby

2. Heating Standby

In heating mode, the indoor fan speed decreases to prevent cold air discharge from the indoor unit. During this
time, (heating standby) is displayed on the remote controller.
① This condition occurs in the following cases.
・ Thermostat OFF
・ Defrosting operation
・ Indoor heat exchanger liquid temperature (E1) < 28˚C and discharge air temperature < 25˚C just after
heating operation started
The fan speed may sametimes increase when this condition continues for 6 minutes.
② The fan mode increases when the heat exchanger liquid temperature (E1) or discharge air
temperature increases.
2
The fan mode is selected based on the discharge air temperature and E1 temperature as shown
in the below fi gure. If the E1 temperature and discharge air temperature are different, the higher
temperature is used.
Temprature (
E1
Discharge air
32 29
30 27
28 25
26 23
20 17
16 13
Operation
*HH
Set
fan H
speed
L
The function of "HH" is identical to the automatic fan speed mode.
)
STOP LL L H HH
LL L H H
STOP
STOP LL L L L
H L LL STOP
H L LL STOP
L L LL STOP
2 - 4
2WAY SYSTEM
Control Functions - Indoor Unit