Honeywell S87K Primary Ignition Control Troubleshooting Guide - York International DFAA User's Information, Maintenance And Service Manual

MOTOR DOES NOT RUN
1. CHECK THE LOW VOLTAGE TRANSFORMER FOR
24 VOLT OUTPUT BETWEEN TERMINAL 3 ON THE
MOTOR START RELAY AND EITHER OF THE "T"
TERMINALS ON THE CONTROL BOX
2. CHECK THE 24 VAC BETWEEN TERMINALS
1 AND 3 ON MOTOR RELAY
3. CHECK FOR 120 VAC BETWEEN TERMINAL
2 ON MOTOR START RELAY AND NEUTRAL LINE
4. CHECK ELECTRICAL WIRING AND CONNECTIONS
5. DOES MOTOR SHAFT TURN FREELY?
.
6. REPLACE MOTOR
IGNITION ARC ESTABLISHED - NO FLAME
1. RESET CONTROL - MONITOR STARTS - COMPLETES 30 SECOND PREPURGE CYCLE, 8 SECOND SAFE START CHECK
AND TRIAL FOR IGNITION, 4 SECONDS HONEYWELL SERIES.
NOTE: THE BURNER MOTOR WILL CONTINUE TO OPERATE DURING THE LOCK OUT MODE WHEN THE THERMOSTAT
CIRCUIT IS CALLED FOR BURNER OPERATION.
2. CHECK FOR CORRECT AIR SETTING RELATIONSHIP
IN ORDER FOR THE FOLLOWING FUNCTIONAL TEST TO BE MADE, THE CONTROL MUST BE RESET AND THE TESTS
MONITORED DURING THE 4 SECOND HONEYWELL SERIES TRIAL FOR IGNITION PERIOD THAT OCCURS AT THE END
OF THE 30 SECOND PREPURGE AND 8 SECOND SAFE START CHECK CYCLE
3. CHECK FOR 120 VAC AT GAS VALVE TERMINALS
4. MAKE SURE LEADS ARE ON THE CORRECT GAS VALVE
5. CHECK FOR CORRECT MANIFOLD PRESSURE
6. REPLACE GAS VALVE
Unitary Products Group
HONEYWELL S87K PRIMARY IGNITION CONTROL
TROUBLESHOOTING GUIDE
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
CHECK ELECTRICAL WIRING
NO
AND CONNECTIONS
CHECK ELECTRICAL WIRING
NO
AND CONNECTIONS
CHECK ELECTRICAL WIRING
NO
AND CONNECTIONS
1. CHECK FOR BLOWER CLEARANCE
NO
2. LUBRICATE MOTOR BEARINGS
CHECK ELECTRICAL WIRING
AND CONNECTIONS. BE
SURE LEADS ARE ON
NO
CORRECT GAS VALVE TERMINALS
107273-UUM-C-0306
REPLACE 24 VAC
OK
20 VA TRANSFORMER
REPLACE MOTOR
OK
START RELAY
REPLACE MOTOR
OK
START RELAY
OK
REPLACE PRIMARY
NO
IGNITION CONTROL
23