On Board Diagnostics; Troubleshooting Guide - Fenwal SERIES 35-67 Manual

TERMINAL DESIGNATIONS - P1 CONNECTOR
Table 1
11-PIN MATING
CONNECTOR
AMP P/N 1-770849-1
PINS AMP P/N 350980-1
DESCRIPTION
PIN WIRE
LOCATION
COLOR
1 Lockout Indicator
ORANGE
2
Thermostat
RED
3 Lockout Indicator (Ground Side)
VIOLET
4
GRAY Airflow (PSW)
5 Gas Valve
BROWN
6
BLUE 24 VAC (Full Time)
7 Reset Button
YELLOW
8 Ground
GREEN
9
Pre-Purge Indicator
WHITE
10 Pressure Switch Option
WH/BLACK
11
BLACK Remote Sense
TERMINAL DESIGNATIONS - P2 & P3 CONNECTOR
Table 2
TERMINAL DESCRIPTION
S1 Ignitor
24, 120 or 240VAC
L1
Input (Hot)
L2 Neutral
S2 Ignitor
Inducer Power
F1
Supply
F2 Inducer Blower
Remote LED
P3/P7
Connector
FC+ & FC- Flame Current
Test Pins
5
CAUTION:
!
Label all wires prior to disconnection when servicing the control.
Wiring errors can cause improper and dangerous operation.
5 A functional checkout of a replacement is recommended.
WARNING:
!
Operation outside specifications could result in failure of the
Fenwal product and other equipment with injury or death to
people and damage to property. Service to this product should
only be preformed by a qualified technician
www.fenwalcontrols.com
MATING QUICK
CONNECTOR CONNECTS
¼ inch optional
¼ inch optional
Tyco 2-520183-2
PINS 350919-3
¼ inch optional
¼ inch optional
¼ inch
¼ inch
MOLEX 22-01-2021
PINS 08-500114
Tyco 61260-1
1-800-FENWAL-1

ON BOARD DIAGNOSTICS

LED INDICATION FAULT MODE
Normal Operation
ON
OFF Internal Control Failure - Check Power
Airflow Fault
1 Flash
Erroneous Flame Signal
2 Flashes
Ignition Lockout
3 Flashes
Hot Surface Ignitor Fault
4 Flashes
5 Flashes Low Voltage (24 VAC)
Valve Relay Problem
6 Flashes
SOFT LOCKOUT RECOVERY
The control will attempt automatic recovery from Fault Codes 1,4,5,
and 6 by a soft lockout mechanism. The control will wait 5 minutes
and if the thermostat is still calling for heat it will attempt a restart
sequence. If the error persists it will be detected and the control will
continue in this soft lockout and retry sequence every 5 minutes
until the problem is corrected.

TROUBLESHOOTING GUIDE

RECOMMENDED ACTIONS
SYMPTOM
A. Miswired
Control will not start up
B. 24 VAC Transformer bad
C. Fuse/Circuit breaker bad
D. Bad control, check LED for
A. Miswired
Thermostat on and no ignition
B. Bad thermostat, no voltage at
C. Failed ignitor
A. Defective ignitor
Valve on - no ignitor
B. Miswired
C. Bad control, check voltage at ignitor
A. Valve coil open
B. Open valve wire
Ignitor on - no valve
C. Bad control, check voltage
A. Bad ignitor
Flame okay during TFI but
B. Bad wire
no flame sense after TFI
C. Poor ground at burner
D. Poor flame, check flame current
LED off A. Verify 24 VAC present
B. Recycle Power
C. If problem persists, replace control
Series 35-67, 24 VAC Hot Surface Ignition Control
steady or flashing codes
thermostat terminal
at gas valve terminal
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