50
[Heating]
According to indoor pipe temperature, automatic heating fan speed is determined as follows.
B. Feedback control
Immediately after the fan motor started, feedback control is performed once every second.
During fan motor on, if fan motor feedback
≥
2550 rpm or < 50 rpm continue for 10 seconds, then fan motor error
counter increase, fan motor is then stop and restart. If the fan motor counter becomes 7 times, then H19 - fan
motor error is detected. Operation stops and cannot on back.
12.3 Outdoor Fan Motor Operation
Outdoor fan motor is operated with one fan speed only. It starts when compressor starts operation and it stops
30 seconds after compressor stops operation.
During cooling operation, and outdoor ambient temperature is below 8°C, outdoor fan speed will be controlled
according to outdoor piping temperature as following:
OD Pipe Temperature
A 26°C
B 33°C
During above condition, when indoor heat exchanger temperature is below 5°C, the outdoor fan will stop
according to outdoor piping temperature as following:
RPM Incre
as
ed
RPM M
a
int
a
in
RPM Red
u
ced
OFF
Indoor Pipe Temp.
3
5
o
C
3
9
o
C
16
o
C
19
o
C
Compre
ss
or:
O
u
tdoor F
a
n:
ON
ON
ON
ON
F
a
n
S
peed
OFF
OFF
3
0
s
ec
AMP Air Conditioning
www.ampair.co.uk | [email protected]
