12a-34
CONTROL SYSTEM
Revision 0
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 FANR. 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
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