507276-04B
Page 54 of 56
Issue 1904
Planned Service
A service technician should check the following items
during an annual inspection. Power to the unit must be
shut off for safety.
Fresh air grilles and louvers
(on the unit and in the
room where the furnace is installed) - Must be open and
unobstructed to provide combustion air.
Burners
- Must be inspected for rust, dirt, or signs of water.
Vent pipe
- Must be inspected for signs of water, cracked,
damaged or sagging pipe, or disconnected joints.
Unit appearance
- Must be inspected for rust, dirt, signs of
water, burnt or damaged wires, or components.
Blower access door
- Must be properly in place and
provide a seal between the return air and the room where
the furnace is installed.
Return air duct
- Must be properly attached and provide
an air seal to the unit.
Operating performance
- Unit must be observed during
operation to monitor proper performance of the unit and
the vent system.
Combustion gases
- Flue products must be analyzed and
compared to the unit specifications.
Problems detected during the inspection may make it
necessary to temporarily shut down the furnace until the
items can be repaired or replaced.
Instruct the homeowners to pay attention to their
furnace.
Situations can arise between annual furnace
inspections that may result in unsafe operation. For
instance, items innocently stored next to the furnace may
obstruct the combustion air supply. This could cause
incomplete combustion and the production of carbon
monoxide gas.
Table 13.
Diagnostic Codes for -02 Control
-02 Integrated Control LED Codes
Red LED Flash Code
Diagnostic Codes / Status of Furnace
LED Off
No power to control or control hardware fault detected
Heartbeat
1
Control powered - displayed during all modes of operation if no errors are detected
1 Flash
Reverse line voltage polarity
2 Flashes
Improper earth ground
3 Flashes
Burner failed to light, or lost flame during heat demand
4 Flashes
Low flame signal - check flame sensor
5 Flashes
Watchguard - burner failed to light, exceeded maximum number of retries or recycles
6 Flashes
Not used
7 Flashes
Primary or Secondary limit open or watchguard mode - limit switch open longer than 3 minutes
8 Flashes
Rollout switch open
9 Flashes
Pressure switch failed to close or opened during heat demand
10 Flashes
Watchguard - Pressure switch opened 5 times during one heat demand
11 Flashes
Pressure switch stuck closed prior to activation of combustion air inducer
12 Flashes
Flame sensed without gas valve energized
13 Flashes
Low line voltage
1
A “heartbeat” is indicated by a “slow flash” - 1 sec on 1 sec off, repeating
NOTE
: Last 10 error codes are stored in memory, including when power is shut off to the unit. To recall, press and release button.
Most recent will be displayed first, LED off for 3 sec, then next error code is displayed, etc. To clear error codes, depress and hold
button longer than 5 seconds.
Содержание BG951UHE
Страница 3: ...507276 04B Page 3 of 56 Issue 1904 Figure 1 Parts Arrangement ...
Страница 22: ...507276 04B Page 22 of 56 Issue 1904 Figure 25 Figure 26 ...
Страница 37: ...507276 04B Page 37 of 56 Issue 1904 Figure 59 Trap Drain Assembly Using 1 2 PVC or 3 4 PVC ...
Страница 43: ...507276 04B Page 43 of 56 Issue 1904 Figure 67 Typical Wiring Diagram ...