12-29
CONTROL SYSTEM
Revision Y05-01
Service Manual - ALPHA
d. STEP 4 : AUTO LED WALK TEST.
•
All the LEDS will turn OFF.
•
All the LEDS will turn ON for 1 second one by one in the following
sequence:
STAND-BY
OPERATE
TIMER
FILTER
COOL
HEAT.
•
In PRX all the LEDS will turn ON for 1 second one by one in the following
sequence : 18 °c
20 °c
22 °c
24 °c
26 °c
28 °c
30 °c
High IFAN
Auto IFAN
Med IFAN
Low IFAN
STAND-BY
TIMER
FILTER
COOL
HEAT.
e. STEP 5: AUTO REALY WALK TEST:
•
All relays will energize one by one in the following sequence:
COMPRESSOR
OUTDOOR FAN
R. V.
HEATER 1
HEATER 2
INDOOR WATER PUMP
SWING or OUTDOOR WATER PUMP
INDOOR FAN: LOW
MID
HIGH.
•
When the relay walk test is completed, the next test will start
automatically.
f. STEP
6:
FREQUENCY
TESTING:
•
If the frequency measuring process fails the COOL LED will turn ON.
In order to move to the next step, press ON/OFF button on the remote
control.
g. STEP
7:
INPUT
TEST.
•
The test purpose is to check the analog real time indicators (thermistors,
LEVEL and clock) according to the table below.
LED Indicator
Condition for LED to be ON
STBY LED
Room thermistor
≠
25°c
OPER LED
Indoor coil thermistor
≠
25°c
TIMER LED
Outdoor coil thermistor
≠
25°c
FILTER LED
Clock
COOL LED
LEVEL 2&3
HEAT LED
LEVEL 4
h. STEP 8: TIMING RESET TEST (WATCH DOG).
•
The test purpose is to verify that the CPU rise time after power failure
is between 1 to 3 sec, test results are indicated on the LEDS : STAND-
BY,OPER, TIMER and FILTER turning ON one by one.
•
The results of the test are coded as follows:
Pass condition:
1 sec - STAND-BY and OPER are turned ON
2 sec - STAND-BY, OPER and TIMER are turned ON
