Intermittent Pilot - UTICA BOILERS UHSW Series Installation, Operation & Maintenance Manual

Error
Code
Number
2 Pressure switch failed to open (stuck closed).
4 Flame current too low. Check for flame.
6 Flame sensed out of normal sequence (before opening or after closing gas valve).
18 Gas valve relays welded. Five consecutive soft lockouts.
23 Flame sensed during prepurge ( before gas valve signaled opened).
24 Flame sensed during postpurge (after gas valve signaled closed).
29 Pressure switch failed to close (Contacts stuck open)
Sensor 1 error. Temperature sensor in well is not reading correctly.
32
Verify it is connected to board. Replace if necessary.
57 Igniter flame rod shorted to burner ground
58 Igniter flame rod shorted to burner ground. Repair or replace igniter.
59 Line Voltage error - voltage out of specification high or low (15-37V (44-66Hz))
Applies only to thermostats having on-board transformer.
Polarity is wrong in this case.
60
Thermostat input higher than threshold.
Line voltage unstable - possibly too may heavy loads switching on and off causing
61
erratic supply voltage.
Soft lockout: maximum number of retries exceeded.
62
Soft lockout is reset after one hour if alarm reason disappears.
63 Soft lockout: maximum number of recycles exceeded.
64 Soft Lockout - electronics failure. On-board self diagnostics detected error.
Over temperature error. Sensor measured temperature in excess of maximum
65
allowable limit.
Note: Soft lockout time is 1 hour or manual reset. Hard lockout requires manual reset.
A.9 Intermittent Pilot
Ignition System Checks
STEP 1: Check ignition cable.
• Verify ignition cable does not run in contact with metal
surfaces.
• Verify only factory supplied Ignition cable (or approved
replacement) is used.
• Verify connections to ignition module and igniter or
igniter-sensor are clean and tight.
• Verify ignition cable provides good electrical continuity.
APPENDIX A - CONTROL MODULE
Table 8 - Troubleshooting Error Codes
Definition
35
STEP 2:
Verify ignition system grounding. Nuisance shutdowns are
often caused poor or erratic grounding.
Common ground is required for module and pilot burner/
igniter sensor.
— Check for good metal-to-metal contact between
pilot burner bracket and the main burner.
— Check ground lead from GND (BURNER) terminal
on module to pilot burner. Verify connections are
clean and tight. If wire is damaged or deteriorated,
replace with No. 14-18 gauge, moisture-resistant,
thermoplastic insulated wire with 105°C [221°F]
minimum rating.
— Check ceramic flame rod insulator for cracks or
evidence of exposure to extreme heat, which can
permit leakage to ground. Replace pilot burner/igniter
sensor and provide shield if necessary.
— If flame rod or bracket is bent out of position, restore
to correct position.
Consequence
Wait for recovery
Non critical alarm
Soft lockout
Hard lockout
Soft lockout
Soft lockout
Wait for recovery
Wait for recovery
Wait for recovery
Wait for recovery
Wait for recovery
Wait for recovery
Wait for recovery
Soft lockout
Soft lockout
Soft lockout
Soft lockout
PN 240012689 Rev. A [05/15/2019]