Troubleshooting Procedure - Bradford White IGI-180R-10 Service Manual

VI - TROUBLESHOOTING

Troubleshooting Procedure

BEFORE CARRYING OUT CHECKS MARKED WITH A # SIGN, DISCONNECT THE POWER SUPPLY.
Unit's wiring diagram can be found on page 29.
Appliance fails to operate (even remote control fails to operate).
1) Is the fuse blown
Fuses are located in plastic
holders in the main harness,
on the lower right hand side
of the appliance.
2) Is the main transformer normal?
(cont.)
Check fuse.
a. Disconnect unit from power supply.
b. # Measure resistance to check the electric fuse
(3 amp)
Normal: less than 1Ω
If normal, proceed to check item 2 below.
Faulty: Replace 3 amp glass fuse. If the fuse
blows again, investigate cause of short circuit.
Check the transformer.
a. Measure the voltage and/or resistance at
connector F, black ~ white wires.
Normal: 100 ~ 120 VAC
Faulty: Check for 120 ~ 125 VAC at the surge
If normal, check item 3 on next page.
Faulty: Replace the transformer.
(Service Procedure IGI-7, page 51)
36
51 ~ 63 Ω resistance
protector, blue ~ brown wires, connector
F .
7
Resistance reading 51 ~ 63 Ω