Reznor DV Operation Manual (for units built before August 2003) - Manual (Page 22)

Form O-DV/RDF/ADF, P/N 148385, Page 21
20. Troubleshooting
Chart 1 - System Troubleshooting (Check the diagnostic lights.)
Symptom or Problem Cause and Remedy
1. Fuses are missing or blown in disconnect switch - replace fuses.
2. Transformer not wired according to diagram - check wiring.
3. Secondary 8A fuse (on transformer) is missing or blown - replace fuse.
4. Indicator light is burned out - replace bulb (P/N 125189).
1. See causes and remedies for Problem 1 above.
2. Optional control relay or door switch contacts are open - to test,
jump terminals 3 to 4 or 1 to 2.
3. Firestat option not ordered - verify order/wiring diagram.
4. Firestat manual reset tripped - reset firestat control.
1. Freezestat option not ordered - verify order/wiring diagram.
2. Freezestat relay contacts are open - checking setting on control.
3. Indicator bulb is burned out - replace bulb (P/N 125189).
1. End switch on damper motor not closed. - check end switch wiring.
2. Faulty damper relay - replace relay.
3. Damper motor miswired - rewire damper motor per wiring diagram.
1. Blower motor not wired correctly - check wiring diagram on motor.
2. Faulty motor starter - replace (check coil first).
3. Faulty blower motor relay - replace relay.
1. Low air switch open - verify pressure drop at burner.
2. Indicator light is burned out - replace bulb (P/N 125189).
3. Faulty low air switch - replace pressure switch (P/N 203932).
1. High air switch open - verify pressure drop at burner.
2. Indicator light is burned out - replace bulb (P/N 125189).
3. High air switch option not ordered - verify order/wiring diagram.
4. Faulty high air switch - replace pressure switch (P/N 203933).
1. Indicator light is burned out - replace bulb (P/N 125189).
2. Tripped manual reset limit control(s) - reset manual control.
3. Faulty manual limit control (s) - replace limit control.
1. Indicator light is burned out - replace bulb (P/N 125189).
2. High ambient control option not ordered - verify order/wiring diagram.
3. High ambient control contacts open - check setting on control.
1. Indicator light is burned out - replace bulb (P/N 125189).
2. Low gas pressure switch option not ordered - verify order/wiring diagram.
3. Low gas pressure switch contacts open - check setting on control.
4. Low gas pressure switch contacts open - check gas pressure.
5. Faulty gas pressure switch - replace gas pressure switch.
1. Indicator light is burned out - replace bulb (P/N 125189).
2. High gas pressure switch option not ordered - verify order/wiring diagram.
3. High gas pressure switch contacts open - check setting on control.
4. High gas pressure switch contacts open - check gas pressure.
5. Manual reset on switch tripped - reset pressure switch manual reset.
6. Faulty gas pressure switch - replace gas pressure switch.
2. Faulty burner enable relay - replace relay.
4. Faulty low stage relay - replace relay.
6. Faulty ignition module - replace entire module.
1. Ignitor not reaching 1.4A threshold - check voltage and current to ignitor.
2. Faulty hot surface ignitor - check continuity, replace ignitor.
3. Faulty ignition module - replace entire module.
1. Lack of power at L1 on ignition module - ECO blown, find cause then
replace ECO.
3. Low stage relay contacts are not closed - check air controller or thermostat
setting.
5. Faulty hot surface ignitor - check continuity at the ignition module and
circuit board. If reading is greater than 5-6 ohms, replace ignitor.
13. Disconnect closed; blower and burner switches in run position;
control switch is in "winter" position; "control power", high gas
normal; "low gas normal"; "firestat normal"; "system switch
energized"; "starter energized" and "freezestat normal" lights are lit;
ignitor glowing but "pilot valve normal" light (thus the pilot valve)
9. Disconnect closed; blower switch in test position; "firestat",
"freezestat", "starter energized", "low air", "high air" and "limit
control normal" lights are lit; but the "ambient (outside air) cutoff
normal" light is not lit.
10. Disconnect closed; blower switch in test position; "firestat",
"freezestat", "starter energized", "low air", "high air", "limit
control normal" and "ambient (outside air) cutoff normal" lights
are lit; but the "low gas pressure normal" light is not lit.
11. Disconnect closed; blower switch in test position; "firestat",
"freezestat", "starter energized", "low air", "high air", "limit
controls normal", "ambient (outside air) cutoff normal" and
"low gas pressure normal" lights are lit; but the "high gas pressure
normal" light is not lit.
12. Disconnect closed; blower and burner switches in run position;
control switch is in "winter" position; "control power", "high gas
normal"; "low gas normal"; "firestat normal"; "system switch
energized"; "starter energized" and "freezestat normal" lights are
lit; but igniter is not becoming energized or beginning to glow.
5. Disconnect closed, blower switch in test position, "firestat",
"freezestat" and "starter energized" lights are lit, but the blower
motor is not operating.
6. Disconnect closed; blower switch in test position; "firestat",
"freezestat" and "starter energized" lights are lit and the blower
motor is operating; but the "low air light" is not lit.
7. Disconnect closed; blower switch in test position; "firestat",
"freezestat", "starter energized" and "low air" lights are lit and the
blower motor is operating; but the "high air light" is not lit.
8. Disconnect closed; blower switch in test position; "firestat",
"freezestat", "starter energized", "low air" and "high air" are lit;
but the "limit control normal" light is not lit.
1. Disconnect switch is closed, but "control power" light is not lit.
2. Disconnect switch is closed, but "firestat normal" light is not lit.
3. Disconnect closed, blower switch in test position, "firestat" light
is lit, but "freezestat" light is not lit
4. Disconnect closed, blower switch in test position, "firestat" and
"freezestat" lights are lit, but "starter energized" light is not lit and
the blower motor is not operating.