Reznor RPBL, Инструкция по установке, эксплуатации и обслуживанию

Страница: 74 / 76

74 SSCBL-RPBL-IOM (10-22) 149159-C
—Continued Table 32. General Troubleshooting
Symptom Probable Cause Remedy
C . Pilot lights
but main
valve will not
open
1 . Manual valve not open Open manual valve
2 . Main valve not operating
a . Defective valve
If 24V power is available at valve connections and valve remains closed,
replace valve
b . Loose wire connections Check and tighten all wiring connections
3 . Ignition control does not power main valve
a . Loose wire connections
Check and tighten all wiring connections
b . Flame sensor grounded, pilot lights, and
spark continues
Ensure that flame sensor lead is not grounded and that insulation or ceramic
is not cracked; replace as required
c . Incorrect gas pressure Adjust gas pressure (refer to Measure and Adjust Manifold (Outlet) Gas
Pressure section)
d . Cracked ceramic at sensor Replace sensor
e . Faulty ignition controller If all checks listed in Spark Ignition System Maintenance section indicate
no other cause, replace ignition controller (do not attempt to repair ignition
controller, which has no field-replaceable parts)
f . Poor microamp signal Adjust pilot regulator
D . Insufficient
heat with
heater
operating
1 . Dirty filters in blower system Clean or replace filters
2 . Incorrect manifold pressure Check manifold pressure (refer to Measure and Adjust Manifold (Outlet)
Gas Pressure section)
3 . Limit control cycling on Check air throughput
4 . Improper thermostat location or adjustment Refer to thermostat manufacturer’s instructions
5 . Belt slipping on blower
Adjust belt tension (refer to Checking and Adjusting Belt Tension section)
6 . Fan control improperly wired Ensure that wiring connections are in accordance with wiring diagram
7 . Defective fan control Replace fan control
8 . Blower set for too low temperature rise Decrease blower speed (refer to
Adjusting Blower Speed
section) or
increase static pressure
E . Cold air
at startup
or during
operation
1 . Fan control improperly wired Ensure that wiring connections are in accordance with wiring diagram
2 . Defective fan control Replace fan control
3 . Incorrect manifold pressure Check manifold pressure (refer to Measure and Adjust Manifold (Outlet)
Gas Pressure section)
4 . Blower set for too low temperature rise Decrease blower speed (refer to Adjusting Blower Speed section) or
increase static pressure
F . Motor will
not run
1 . Circuit open Check wiring and connections
2 . Inoperative fan control Replace fan control
3 . Fan control improperly wired Ensure that wiring connections are in accordance with wiring diagram
4 . Inoperative contactor Replace contactor
5 . Defective motor Replace motor
G . Motor
turns ON and
OFF while
burner is
operating
1 . Fan control heater element improperly
wired
Ensure that wiring connections are in accordance with wiring diagram
2 . Defective fan control Replace fan control
3 . Motor overload device cycling Verify motor load against motor rating plate
Replace motor or overload device
4 . Three-phase motor rotating in opposite
direction
Interchange two legs of supply connections
H . Motor
cuts out on
overload
1 . Improper motor pulley adjustment Ensure that motor pulley is properly-adjusted (refer to
Adjusting Blower
Speed
section)
2 . Improper static pressure on duct system Adjust dampers in duct system
3 . Low voltage Check power supply
TROUBLESHOOTING—CONTINUED