Bradford-White Corp UDH75T50FR*N Manual De Usuario

4

None (LED not on or 

flashing

Pilot assembly is not lit

1. If set point knob is in “PILOT” 
position then pilot flame is detected. 
Turn set point knob to desired setting. 
2. If the set point knob is already at 
the desired setting, the water heater is 
satisfied. 

One flash and three 

second pause

Two quick flashes 

and a three second 

pause

Gas control is calling for heat (no 
fault).

Two flashes and 

three second pause

Weak pilot signal detected. System will 
reset when pilot flame is sufficient.

.
Gas Control is not powered. Light pilot.

1. Gas Control is powered and waiting 
for the set point knob to be turned to a 
water temperature setting.
2. Water heater is satisfied and 
operating normally. 

Tank temperature below set point of 
thermostat. 

1. Thermopile failure
2. Unstable pilot
3. Pilot tube block or restricted.

If the pilot will not stay 
lit replace pilot 
assembly. If problem 
persists replace Gas 
Control.

1. Adjust set point knob 
to desired setting. 

Normal operation. 

1. See service

procedure II

2. See service

procedure III

3. See service

procedure III

Flammable Vapor Ignition Resistant Water 
Heaters

Green LED Indicator

Observe green LED indicator on 
Gas Control. Error flash codes are 
displayed with a three second pause 
before repeating. Check and repair 
the system as noted in the 
troubleshooting table below.

Four flashes and 

three second pause

Excessive tank temperature. System 
must be reset.

1. Temperature sensor out of

calibration

2. Faulty Gas Control

1. See service

procedure V

2. See service

procedure V

4

LED on continuously

(Solid)

Set point knob has been recently 
turned to the “OFF” position. Wait 
until LED goes out before 
attempting to relight

Set point knob was turned to “OFF” 
position.

LED will go out and the 
control will function 
normally when the pilot 
is lit.