Lochinvar ArmorX2 1.5 - Manual (Page 38)

3
Troubleshooting
38
Label all wires prior to disconnection when
servicing controls. Wiring errors can
cause improper and dangerous operation.
Always disconnect power to the water
heater before servicing. Failure to comply
could result in severe personal injury,
death, or substantial property damage.
Never jumper (bypass) any device except
for momentary testing as outlined in the
Troubleshooting chart. Severe personal
injury, death, or substantial property
damage can result.
Before troubleshooting:
1. Have the following items:
a. Voltmeter that can check 120 VAC, 24 VAC, and
12 VDC.
b. Continuity checker.
c. Contact thermometer.
2. Check for 120 VAC (minimum 102 VAC to maximum
132 VAC) to water heater.
3. Make sure all external limit controls are installed and
operating.
Check the following:
1. Wire connectors to control module are securely plugged
in at the control module and originating control.
2. Gas pressures:
• Maximum: 14 inches w.c. (3.5 kPa) natural,
14 inches w.c. (3.2 kPa) LP with no flow (lockup)
or with water heater on
• Minimum: 4 inches (5 inches on 1.0 models only) w.c.
(1.0 kPa) natural, 8 inches w.c. (2.0 kPa) LP with gas
flowing (verify during water heater startup)
Check control module fuses
ALWAYS check control module fuses
before replacing control module or any
major components (blower, etc.). If one
of these fuses is blown, it can prevent the
control module or other components from
operating.
1. Turn OFF the power to the water heater at the external
line
switch.
2. Remove the front access cover.
3. Remove the two (2) screws securing the control panel to
the unit to gain access to the control module.
F4 - 3.15 AMP FUSE
BLOWER
F3 - 1.25 AMP FUSE
MAIN BOARD
F5 - 5 AMP FUSE
PUMPS
F2 - 3.15 AMP FUSE
24V SUPPLY
Figure 3-1 Control Module Fuses
4. Remove the two (2) nuts on the control module cover.
5. Inspect fuses F2, F3, F4, and F5, see FIG 3-1 below.
6. The water heater is shipped with six (6) spare fuses in
a plastic bag located under the low water cutoff on the
control module.
7. If necessary, replace open fuse (F3 is 1.25 amps, F2 and F4
are 3.15 amps, and F5 is 5 amps).
Note: Fuses F2 - F5 are all slow blow fuses.
Do not jumper fuse or replace with any
fuse except as specified. Failure to comply
could result in severe personal injury,
death, or substantial property damage.
8. Re-install the control module cover using the nuts
removed in Step 4.
Note: If the spark wire was unplugged, reattach it to the
control.
9. Re-install the control panel using the two (2) screws
removed in Step 3. Re-install the front access cover after
fuse inspection.
10. Restore power to the water heater at the external line
switch and verify water heater operation (Section 9 -
Start-up in the Armor X2 Installation and Operation
Manual) after completing water heater service.
ƽ WARNING
ƽ WARNING
NOTICE
ƽ WARNING
Service Manual