John Wood Commercial - AJWSC - Manual (Page 27)

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Detect Conditions Alarm (ERROR) Name Control Action
Service
Suggestion (After
Error Matured)
Detection
Time
Remote
Display
Valve relays
shorted/open, other
internal electronic
failures SLO_ELECTRONICS Soft lockout. Replace control. All time. SoftLockout
Flame out of
sequence. SLO_FLAME_SEQ Soft lockout. Check gas supply,
burner and
harness. During a
heating cycle. SoftLockout
Flame detected
before trial. FLAME_IN_PREPURGE Soft lockout. Check gas supply,
burner and
harness. Before ignition. SoftLockout
Flame detected after
trial. FLAME_IN_POSTPURGE Soft lockout. Check gas supply,
burner and
harness. After a heating
cycle. SoftLockout
Sensor 1 or Sensor
2 reporting greater
than 200°F. OVER_TEMP Non-volatile Hard
Lockout for Europe.
Auto-reset for
domestic. Check Appliance
operation and limit
sensor. All time. OverTemp
Valve relays welded
5 times. ELECTRONICS Non-volatile Hard
Lockout for Europe.
Auto-reset for
domestic. Replace control. During a
heating cycle. Hard Lockout
Table 6 (cont’d) Error Codes