Before troubleshooting, Check the following

3 Troubleshooting

Service Manual

WARNING

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.

Figure 3-1Control Module Fuses

F3 - 1.25 AMP FUSE

MAIN BOARD

F4 - 3.15 AMP FUSE

BLOWER

WARNING 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

	NOTICE	ALWAYS check control module fuses
	NOTICE	before replacing control module or any
		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.

F5 - 5 AMP FUSE

PUMPS

F2 - 3.15 AMP FUSE

24V SUPPLY

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.

WARNING 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.