Effective: March 2020
F-35-703
3
Wiring Diagrams - 35-703
Figure 1. Local Sense
Figure 2. Remote Sense
Internal Control Failure
If the control detects a software or hardware error, all outputs
are turned off and the LED displays a Steady On condition. If this
condition persists after an attempt to restart, then the control
must be replaced.
Proper Electrode Location
Proper location of electrode assembly is important for optimum
system performance. The electrode assembly should be located
so that the tips are inside the flame envelope and about 1/2-inch
(1.2 cm) above the base of the flame as shown:
Notes:
•
Ceramic insulators must not be in or close to the flame.
•
Electrode assemblies must not be adjusted or
disassembled. Electrodes are NOT field adjustable.
•
Electrodes should have a gap spacing of 0.125± 0.031
in (3.12± 0.81 mm), unless otherwise specified by the
appliance manufacturer. If spacing is not correct, the
assembly must be replaced.
•
Exceeding temperature limits can cause nuisance
lockouts and premature electrode failure.
•
Electrodes must be located where they are not exposed
during normal operation.
TROUBLESHOOTING
Note:
During a fault condition, the LED will flash on for
1/4 second and off for 1/4 second as needed to
indicate the fault code. The code will repeat every
3 seconds. Removing power from the control will
clear the fault code.
L2
SPARK
BURNER
BURNER GROUND
H.V. OUT
120V THERMOSTAT
OR CONTROL DEVICE
L1
PV
MV
L2
L2
V2
L1
B. GND
PV1
MV1
L1
L2
120V THERMOSTAT
OR CONTROL DEVICE
PV
MV
L2
L2
V2
L1
B. GND
S1
H.V. OUT
SPARK
BURNER
BURNER GROUND
PV1
MV1
Troubleshooting Guide
Symptom
Recommended Actions
1. Control does not start
A. Miswired
B. No 120VAC at L1
C. Fuse or circuit breaker fault
D. Faulty control, check LED
for fault codes
2. Thermostat on - no spark
A. Miswired
B. Faulty thermostat, no
voltage at terminal L1
C. Faulty control, check LED
for fault codes
3. Valve on - no spark during
TFI
A. Shorted electrode -
establish 1/8-inch gap
B. Check high voltage cable
C. Miswired
4. Spark on - valve off
A. Valve coil open
B. Valve wire disconnected
C. Faulty control, check
voltage at gas valve
terminals PV1 or MV1 and
V2
5. Flame okay during TFI - no
flame sense after TFI
A. Check electrode position
B. Check high voltage wire
C. Poor ground at burner
D. Poor flame, check flame
current
Fault Conditions
LED Indication
Fault Mode
Steady On
Internal Control Failure
2 Flashes
Pilot Flame without call for heat
3 Flashes
Ignition Lockout
