Electrolux EN18WI30LS Service Manual page 15

EN19WI30LS / EP19WI30LS
Water heating
Connect power
Bypass flow control valve
and heat exchanger flow
control valve move to
initial position setting
NO
Lightning safety
device normal
YES
●
ON/OFF button turn ON
Set. Temp. indicates on the display
Maximum output limited
Bypass and H.E. flow control valves open
Warning indication
Self-diagnosis NO
Normal combustion
possible
YES
1
Overheat prevention
NO
device (Thermal fuse) normal
(less than 430°F)
YES
Warning indication
2
Heat exchanger NO
flow control valve
normal
YES
Warning indication
3
Bypass
NO
flow control valve
normal
YES
NO
Setting 125°F or higher
YES
Bypass flow control
3
valve closes
Hot water fixture opened
4
NO
Water flow sensor detects
> 0.5 GPM
YES
NO
Initial check
normal
YES
*1
5
NO
Inlet water high
temperature check
normal
YES
10 Fan motor ON
11 Fan speed
(After 60 sec)
NO
(target ± 200 rpm)
YES
1 Igniter sparks
Primary gas solenoid
13
valve opens
Gas solenoid valve 1
14
opens
Gas solenoid valve 2
15
opens
Gas proportioning valve
16
opens
1st, 4th, 7th: after 5 sec.
17
others: after 2 sec.
Flame rod NO
detects 1μA
Igniter stops sparking
YES
BURNER ON lamp
lights
Igniter stops sparking
Gas solenoid valve 1
14 opens or closes
(as necessary) *2
Gas solenoid valve 2
15
opens or closes
(as necessary) *2
Gas solenoid valve 3
18 opens or closes
(as necessary) *2
Gas solenoid valve 4
19
opens or closes
(as necessary) *2
At max. BTU is
NO
outlet water temp. less
than setting
YES
Heat exchanger flow
2
control valve activates
Flow is adjusted
NO
Safety device
triggered
YES
Warning indication
The unit will continue to operate with the error
code blinking on the remote controller.
NO
5 years or more
of use
YES
Self-diagnosis NO
Normal combustion
possible
YES
Warning indication
Self-diagnosis NO
Normal combustion
possible
YES
5
Inlet thermistor
open or shorted
6
Outlet thermistor
open or shorted
7
Heat exchanger thermistor
open or shorted
8
Exhaust thermistor
open or shorted
<-DV model only>
Circuit board
abnormality
Abnormal gas solenoid
valve drive circuit
9
Flame rod circuit abnormality
(1μA or more)
22
Condensate drain trap Blockage
YES
Re-ignition
NO
(8 times or less)
YES
Extinction NO
(5 times or less)
YES
20
NO (3rd)
High limit switch
is normal
Primary gas solenoid
valve closes
Gas solenoid valve 1
closes
Gas solenoid valve 2
closes
Gas proportioning valve
closes
Gas solenoid Valve 3
closes
Gas solenoid Valve 4
closes
BURNER ON Lamp
goes off
1
Overheat prevention
device (Thermal fuse)
triggered(430°F or more)
9 6
Flame rod does
Outlet water temp.
not detect a flame
is too high
(0.5μA or less)
*3 When the present fan speed is 500rpm more or less than target speed.
Shutdown procedure
Fix problem
Hot water fixture closed
Disconnect power
BURNER ON lamp
Display turns OFF
Error code stops flashing Gas proportioning valve
Primary gas solenoid
Turn power Off
Gas solenoid valve 1
Gas solenoid valve 2
Gas solenoid valve 3
Gas solenoid valve 4
Fan motor post purge
Heat exchanger flow
control valve opens fully
Fan motor stops
passed since hot water
exchanger thermistor
Hot water fixture closed
Bypass flow control
valve closes
Fan motor stops
Primary gas solenoid *1 If the inlet temp. is less than 122°F
valve closes
or if the following statements
Gas solenoid valve 1
about K are true,
closes
the inlet temperature
Gas solenoid valve 2
will be normal (YES)
closes
Gas solenoid valve 3
*2
closes
Gas solenoid valve 4
Over
closes
127,000
Gas proportioning valve
BTU
closes
BURNER ON lamp
Gas solenoid
ON
goes off
valve 1
Gas solenoid
ON
valve 2
Gas solenoid
ON
valve 3
Gas solenoid
ON
valve 4
22 6 8
Condensate drain trap
Exhaust thermistor
Outlet thermistor
abnormality (check for
open or shorted
blockage and
open or shorted
<-DV model only>
electrode connections)
5 7 11
Heat exchanger
Inlet thermistor
thermistor
open or shorted abnormality
open or shorted
15
Water flow
NO
sensor detects
< 0.4 GPM
YES
goes off
closes
valve closes
closes
closes
closes
closes
Has 6min.
NO
fixture closed
YES
Heat
NO
< 104°F
Approx. 29.7
K > + water inlet temperature (°F)
Total water flow (GPM)
Set temperature
Less than 125°F 125°F or more
Set temp. + 9°F
K 136°F
Over Over Over Over Over
76,200 44,400 31,750 19,000 16,000
BTU BTU BTU BTU BTU
ON ON ON ON
ON ON ON
ON
ON
Using terms is
Abnormal
equivalent to
combustion
more than 10 years
Fan speed Exhaust temperature
is too high
*3