Airwell YCF055, Service Manual

Page: 83 / 113

11-33
CONTROL SYSTEM
SM FBFRPM 1-A.0 GB
d. S TEP 3: AUTO LED WALK TE S T.
1) All the LED S will turn OFF.
2 ) All the LED S will turn ON for 1 second one by one in the following sequence:
S TAND-B Y
Ö
OPERATE
Ö
TIMER
Ö
FILTER
Ö
COOL
Ö
HEAT.
3) In PRX a ll the LED S will turn ON for 1 second one by one in the following
sequence : 18 °c
Ö
2 0 °c
Ö
22 °c
Ö
2 4 °c
Ö
26 °c
Ö
2 8 °c
Ö
30 °c
Ö
High IFAN
Ö
Auto IFAN
Ö
Med IFAN
Ö
Low IFAN
Ö
S TAND-B Y
Ö
TIMER
Ö
FILTER
Ö
COOL
Ö
HEAT.
e. S TEP 4: AUTO REAL Y WALK TE S T:
All rel a ys will energize one by one in the following sequence:
COMPRE SS OR
Ö
OUTDOOR FAN
Ö
R. V.
Ö
HEATER 1
Ö
HEATER 2
Ö
INDOOR WATER PUMP
Ö
S WING or OUTDOOR WATER PUMP
Ö
INDOOR
FAN: LOW Ö MID Ö HIGH.
When the rel a y w a lk test is completed, the next test will st a rt a utom a tic a lly.
f. S TEP 5: FREQUENC Y TE S TING:
If the frequency me a suring process f a ils the COOL LED will turn ON. In order to
move to the next step, press ON/OFF button on the remote control.
g. S TEP 6 : INPUT TE S T.
The test purpose is to check the a n a log re a l time indic a tors (thermistors, LEVEL
a nd clock) a ccording to the t a ble below.
LED Indicator Condition for LED to be ON
S TB Y LED
Room thermistor z 2 5°c
OPER LED
Indoor coil thermistor z 2 5°c
TIMER LED
Outdoor coil thermistor
z
2 5°c
FILTER LED Clock
COOL LED LEVEL 2 &3
HEAT LED LEVEL 4
h. S TEP 7: TIMING RE S ET TE S T (WATCH DOG).
The test purpose is to verify th a t the CPU rise time a fter power f a ilure is between 1
to 3 sec, test results a re indic a ted on the LED S : S TAND-B Y ,OPER, TIMER a nd
FILTER turning ON one by one.
The results of the test a re coded a s follows:
P a ss condition:
1 sec - S TAND-B Y a nd OPER a re turned ON
2 sec - S TAND-B Y , OPER a nd TIMER a re turned ON