Shizuoka Seiki VAL6 EPX Series, Руководство по обслуживанию

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PAGE 12
VAL6 EPX Trouble Shooting
No. Possible Cause How to check Result Remedy
EPX1 EPX5
red-white: approx. 1.6kΩ red-white: approx. 200Ω
purple-purple:
approx. 10Ω purple-purple: approx. 6Ω
15
14
17
Only operation lamp is lit, but heater does not start
Replace a power cord
Plug in connector (CN 1)
firmly
Take power source
connector (CN 11) out
from burner control, then
check each lead with
circuit tester Power cord is
disconnected 11
Replace a burner control
If tester reads normal
voltage at input side, and
reads 0V at output side,
transformer is defective Measure voltage at output
side of transformer
connector (CN 10)
Plug in connector (CN 11)
firmly If it works normally, power
source connector fails on
contact Plug in power source
connector (CN 11) again,
then turn on
Plug in connector (CN 10)
firmly
If either of the lead is
broken, power cord is
broken
Replace an operation
switch If it doesn't conduct when
turned on switch, operation
switch is defective
Transformer is
defective
If power source is normal
and tester reads 0V at
input side, burner control is
defective Measure voltage at input
side of transformer
connector (CN 10)
EPX5 red-white: AC120V
(input voltage) EPX1 red-white: AC230V
(input voltage)
(Cord color & Standard value)
If it works normally,
thermostat connector fails
on contact
18
Replace a transformer Disconnect transformer
connector (CN 10) from
burner control, then
measure resistance. If it shows ∞Ω, the
transformer cord is
disconnection
If it works normally,
operation switch connector
fails on contact
(Cord color & Standard value)
Power source
connector is loose
connection
Transformer connector
is loose connection
Plug in transformer
connector (CN 10) again,
and then turn on If it works normally,
transformer connector fails
on contact
Take operation switch
connector (CN 1) out, then
check the conduction Operation switch is
defective
Check the conduction of
external thermostat
12
Thermostat connector
(CN6) is loose
connection Plug in thermostat
connector (CN 6) again,
and then turn on
13
Plug in operation switch
connector (CN 1) again,
and then turn on Operation switch
connector is loose
connection
Transformer cord is
disconnection
Circuit board (Burner
control) is defective
16
External thermostat is
working / External
thermostat cord is
disconnection /
External thermostat is
defective 20
19 Plug in connector (CN 6)
firmly
Change the setting of a
thermostat / Replace a
thermostat
If it doesn't conduct (∞Ω),
External thermostat is
working / External
thermostat cord is
disconnection / External
thermostat is defective
(Cord color & Standard value) purple-purple: AC12.5V
Replace a transformer