Heating Standby - Panasonic S-22MF2E5A8 Service Manual & Test Run 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 sometimes 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.
The fan mode is selected based on the discharge air temperature and E1 temperature as shown
in the below figure. 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
Set *HH STOP LL L
fan H LL L H
STOP
speed
L STOP LL L
The function of "HH" is identical to the automatic fan speed mode.
H HH H L LL STOP
H H L LL STOP
L L L L LL STOP
< FRESH AIR INTAKE MODE (Type E2) >
Temprature ( )
E1
Discharge air
26 1
20 0
16 -1
Operation
fan speed STOP
2 - 5
VRF SYSTEMS Indoor Unit
H STOP
2