Airwell ONG3-18, Service Manual

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12-28
CONTROL SYSTEM
Revision 0 Service Manual - EDS
d. STEP 4 : AUTO LED WALK TEST.
x
All the LEDS will turn OFF.
x
All the LEDS will turn ON for 1 second one by one in the following
sequence:
STAND-BY OPERATE TIMER FILTER COOL HEAT.
x
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:
x 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.
x
When the relay walk test is completed, the next test will start
automatically.
f. STEP 6: FREQUENCY TESTING:
x
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.
x
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
r o t s i m r e h t m o o R D E L Y B T S z 25°c
r o t s i m r e h t li o c r o o d n I D E L R E P O
z
25°c
TIMER LED Outdoor coil thermistor
z
25°c
FILTER LED Clock
3 & 2 L E V E L D E L L O O C
4 L E V E L D E L T A E H
h. STEP 8: TIMING RESET TEST (WATCH DOG).
x 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.
x
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