Electra DNC series Service Manual page 97

CONTROL SYSTEM
STEP 3 :AUTO LED WALK TEST.
1) All the LEDS will turn OFF.
2) All the LEDS will turn ON for 1 second one by one in the following sequence :
STAND-BY OPERATE
3) In PRX all the LEDS will turn ON for 1 second one by one in the following
sequence : 18 °c
Auto IFAN Med IFAN
STEP 4: AUTO REALY WALK TEST:
All relays will turn ON one by one in the following sequence :
COMPRESSOR
PUMP SWING or OUTDOOR WATER PUMP
When the relay walk test is completed, the next test will start automatically.
STEP 5: 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.
STEP 6 : INPUT TEST.
This stage is testing the analog real time indicators (thermistors, LEVEL and clock) according
the table below.
LED indicator
STBY LED
OPER LED
TIMER LED
FILTER LED
COOL LED
HEAT LED
STEP 7 : TIMING RESET TEST (WATCH DOG).
The test purpose is to find out 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 are turning
ON one by one.
The results of the test are coded as follow:
pass condition
1 sec - STAND-BY and OPER are turn ON
2 sec - STAND-BY ,OPER and TIMER are turn ON
Fail condition
0 sec - STAND-BY is turn ON
3 sec - STAND-BY ,OPER , TIMER and FILTER are turn ON
When the timing reset test is completed, the next test will start automatically.
8-30
TIMER
20 °c 22 °c 24 °c
Low IFAN STAND-BY
OUTDOOR FAN R. V.
Revision Y05-01
CONTENT
FILTER COOL HEAT.
26 °c 28 °c
TIMER FILTER
HEATER 1 HEATER 2
INDOOR FAN:
Condition for LED to be ON
Room thermistor ≠ ≠ ≠ ≠ 25 °c
Indoor coil thermistor ≠ ≠ ≠ ≠ 25 °c
Outdoor coil thermistor ≠ ≠ ≠ ≠ 25 °c
LEVEL 2&3
LEVEL 4
Service Manual - DNC Series
30 °c High IFAN
COOL HEAT.
INDOOR WATER
LOW MID HIGH.
Clock