Lochinvar CG 120 THRU 400A, Установка, эксплуатация и обслуживание

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SERVICE
The installer may be able to observe and correct certain problems
which may arise when the unit is put into operation. HOWEVER, it
is recommended that only qualified servicemen, using appropriate
test equipment, be allowed to service the heater.
As preliminary step, check wiring against diagram, check for
grounded, broken or loose wires. Check all wire ends to be sure
that they are making good contact.
ELECTRICAL SERVICING
CAUTION
LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN
SERVICING CONTROLS. WIRING ERRORS CAN CAUSE
IMPROPER AND DANGEROUS OPERATION.
VERIFY PROPER OPERATION AFTER SERVICING.
REPLACEMENT PARTS
Replacement parts may be ordered through Lochinvar
dealers, authorized servicers or distributors. Refer to the
Yellow Pages for where to call or contact the Parts Department,
300 Maddox Simpson Pkwy, Lebanon, TN 37090,
Phone: 615-889-8900 • Fax: 615-882-2918, email:
parts_team@lochinvar.com, www.Lochinvar.com. When
ordering parts be sure to state the quantity, part number and
description of the item(s) including the complete model and
serial number as it appears on the product. Refer to the part’s
list for more information.
Green LED
Flash Code
a
Indicates Next System Action Recommended Service Action
OFF No “Call for Heat” Not applicable None
Flash Fast Power up - internal check Not applicable None
Heartbeat Normal startup – ignition
sequence started (including
prepurge)
Not applicable None
4 Seconds
ON then “x”
flashes
Device in run mode. “x” = flame
current to the nearest μA.
Not applicable None
2 5 minute Retry Delay - Pilot flame
not detected during trial for ignition
Initiate new trial for ignition after
retry delay completed.
If system fails to light on next trial
for ignition check gas supply, pilot
burner, spark and flame sense
wiring, flame rod contaminated or
out of position, burner ground
connection.
3 Recycle - Flame failed during run Initiate new trial for ignition. Flash
code will remain through the
ignition trial until flame is proved.
If system fails to light on next trial
for ignition, check gas supply, pilot
burner, flame sense wiring,
contamination of flame rod, burner
ground connection.
4 Flame sensed out of sequence If situation self corrects within 10
seconds, control returns to normal
sequence. If flame out of
sequence remains longer than 10
seconds, control will resume
normal operation 1 hour after error
is corrected.
Check for pilot flame. Replace gas
valve if pilot flame present. If no
pilot flame, cycle “Call for Heat.” If
error repeats, replace control.
6 Control Internal Error Control remains in wait mode.
When the fault corrects, control
resumes normal operation.
Cycle “Call for Heat”. If error
repeats, replace control.
7 Flame rod shorted to ground Control remains in wait mode.
When the fault corrects, control
resumes normal operation.
Check flame sense lead wire for
damage or shorting. Check that
flame rod is in proper position.
Check flame rod ceramic for
cracks, damage or tracking.
8 Low secondary voltage supply Control remains in wait mode.
When the fault corrects, control
resumes normal operation.
Check transformer and AC line for
proper input voltage to the control.
Check with full system load on the
transformer.
a
Flash Code Descriptions:
- Flash Fast: rapid blinking.
- Heartbeat: Co nstant ½ second bright, ½ second dim cycles.
- 4 second solid on pulse followed by “x” 1 second flashes indicates flame current to the nearest μA. This is only available in run mode.
- A single flash code number signifies that the LED flashes X times at 2Hz, remains off for two seconds, and then repeats the sequence.
322568-000 REV. XX