- 26 -
- 27 -
3-4 Fault Findings and Error Code
Error code
ERROR
CODE
ON
REMOTE
CONTROL
CONDITION
OF
LED IN PCB
NUMBER
OF
FLASHING
PHENOMENON
SYMPTOM
CAUSE
CHECK METHOD
CORRECT
VALUE
REFER
FIGURE
-
NOT
FLASHING
-
NOTHING STARTS AND REMOTE’S
DISPLAY DOES NOT INDICATE
FUSE DEFECT
CHECK THE CONTINUITY OF FUSE ON PCB
0Ω
Fig.1
NOTHING STARTS, ONLY REMOTE’S
DISPLAY INDICATES SWITCH ON
WATER INLET FILTER CLOG UP.
VISUAL CHECK AND CLEAN IT.
WATER FLOW SENSOR DEFECT
VISUAL CHECK.
AS NEXT STEP, PULL OUT CONNECTOR(4),
CHECK FAN MOTOR IS ROTATED WHEN CONNEC-
TION WITH TWO PINS OF THE BOTTOM.
Fig.2
111
FLASHING
1
GAS BURNER
FAILS TO IGNITE
NO IGNITION,
THEN LED
STARTS
FLASHING AFTER
30 SECS.
IGNITOR DEFECT
CHECK AC VOLTAGE BETWEEN BLACK AND BLACK
AT CONNECTOR (9) IN IGNITION
AC240V Fig.3
BROKEN INSULATOR AT IGNITOR
TERMINAL
VISUAL CHECK OF IGNITOR TERMINAL
THERMAL FUSE ACTIVATED.
(BREAKING OF THE WIRE)
CHECK THE CONTINUITY IN TRANSMISSION
CONNECTOR (YELLOW) FOR FUSE SIDE.
0Ω
Fig.4
GAS VALVE DEFECT
CHECK FOR DC VOLTAGE AT CONNECTOR (8)
IN IGNITION OR CHECK FOR CONTINUITY IN GAS
VALVE RESPECTIVELY.
Table 1
Fig.5
GAS CONTROL VALVE DEFECT
CHECK FOR DC VOLTAGE AT CONNECTOR (4)
IN IGNITION OR CHECK FOR CONTINUITY IN GAS
VALVE RESPECTIVELY.
Table 1
Fig.6
LOSS OF GAS SUPPLY
CHECK GAS INLET PRESSURE
Table 2
INGNITES, THEN
LED STARTS
FLASHING AFTER
30 SECS.
FLAME ROD INSULATOR
FAILURE, BREAKING OR SHORT
CIRCUIT
VISUAL CHECK OF FLAME ROD INSULATION
EARTH CABLE
CHECK FOR BREAKING OR LOOSE CONNECTIONS
AT TERMINAL.
NOZZLE HOLDER
VISUAL CHECK OF NOZZLE HOLE’S BLOCKAGE.
721
2
FALSE FLAME
DETECTION
LED FLASHES
IMMEDIATELY
PCB FAILURE
EXCHANGE PCB
121
3
LOSS OF
COMBUSTION
COMBUSTION
STOPS AND LED
STARTS
FLASHING
LOSS OF GAS SUPPLY
CHECK GAS INLET PRESSURE
Table 2
INSUFFICIENT PRESSURE
ADJUSTMENT AT MANIFOLD
PRESSURE
CHECK FOR MANIFOLD PRESSURE
Table 2
141
4
OVER HEAT
THERMOSTAT
CUT OFF
COMBUSTION
STOPS AND LED
STARTS
FLASHING
OVER HEAT THERMOSTAT CUT
OFF DEFECT
CHECK THE CONTINUITY BETWEEN THE
TERMINALS OF THE DEVICE.
0Ω
Fig.7
321
5
TEMPERATURE
SENSOR WIRE
BREAKING
(OUTGOING)
LED FLASHES
IMMEDIATELY
TEMPERATURE SENSOR WIRE
BREAKING
CHECK THE RESISTANCE IN TRANSMISSON
CONNECTOR FOR SENSOR SIDE.
Table 3
Fig.8
001
6
POWER FAILURE
DETECTION
COMBUSTION
STOPS AND LED
STARTS
FLASHING
IMMEDIATELY
POWER FAILURE OR INTERRUP-
TION OCCURS DURING
COMBUSTION
CLOSE WATER TAP AND OPEN IT AGAIN.
611
7
FAN MOTOR
FAILURE
NO IGNITION, LED
STARTS
FLASHING AFTER
10 SECS.
FAN MOTOR DEFECT
EXCHANGE FAN MOTOR.
740
750
NOT
FLASHING
-
NOTHING OPERATES AND THE
ERROR CODE DISPLAYS IN 1 MINUTE. PCB DEFECT
TURN OFF AND ON. IF NOT RECOVERY, REPLACE
PCB.
740
FLASHING
8
COMMUNICATION
FAILURE WITH
MAIN REMOTE
CONTROLLER
NO COMBUSTION
OR COMBUSTION
STOPS,
COMBUSTION
INDICATOR
FLASHES
IMMEDIATELY
REMOTE CONTROLLER FAILURE
WHEN OPENING HOT WATER TAP WITHOUT
CONNECTING REMOTE CONTROLLER, IF NORMAL
COMBUSTION STARTS, REPLACE REMOTE
CONTROLLER.
750
COMMUNICATION
FAILURE WITH
BATH/ENSUITE
REMOTE
CONTROLLER
760
COMMUNICATION
FAILURE
WIRE BREAKAGE OF REMOTE
CONTROLLER CABLE,
SHORT-CIRCUITED
VISUAL CHECK OF WIRE AND REMOTE
CONTROLLER CONNECTIONS
651
9
WATER FLOW
CONTROL VALVE
FAILURE
LED FLASHES
IMMEDIATELY
WATER FLOW CONTROL VALVE
DEFECT
EXCHANGE WATER FLOW CONTROL VALVE
341
11
TEMPERATURE
SENSOR WIRE
BREAKING
(AMBIENT)
TEMPERATURE SENSOR WIRE
BREAKING
CHECK THE RESISTANCE IN TRANSMISSION
CONNECTOR FOR SENSOR SIDE.
Table 3
735
15
CASCADE
COMMUNICATION
FAILURE
WIRE BREAKAGE OF CASCADE
CABLE
VISUAL CHECK OF WIRE AND PCB CONNECTIONS
CASCADE SET UP MISTAKE
CHECK THE SETTING OF DIP SWITCH2 ON PCB
Installa-
tion
instruc
-
tions
510
16
MAIN GAS VALVE
FAILURE
GAS VALVE DEFECT
EXCHANGE GAS CONTROL VALVE.
511
17
GAS VALVE FAIURE
(NOT MAIN)
311
18
TEMPERATURE
SENSOR WIRE
BREAKING
(INCOMING)
TEMPERATURE SENSOR WIRE
BREAKING
CHECK THE RESISTANCE IN TRANSMISSON
CONNECTOR FOR SENSOR SIDE.
Table 3
Fig.8
