ICC Mirius, Installation Instructions Manual

Page: 38 / 56

38
BACnet / Boilers
Table 37. Lock and Hold Codes
Code Description Recommended Troubleshooting of Lockout Codes
20 Internal fault: Flame ripple and overflow Internal Fault.
1. Reset Module.
2. If fault repeats, replace module.
21 Internal fault: Flame number of sample
mismatch
22 Internal fault: Bias changed since heating cycle starts
23 Internal fault: Bias changed since heating cycle starts
24 Internal fault: Spark voltage stuck low or high
25 Internal fault: Spark voltage changed too much during
flame sensing time
26 Internal fault: Static flame ripple
27 Internal fault: Flame rod shorted to ground detected
28 Internal fault: A/D linearity test fails
29 Internal fault: Flame bias cannot be set in range
30 Internal fault: Flame bias shorted to adjacent pin
31 Internal fault: SLO electronics unknown error
32-46 Internal fault: Safety Key 0 through 14
System Errors
47 Flame Rod to ground leakage
48 Static flame (not flickering)
49 24VAC voltage low/high 1. Check the Module and display connections.
2. Check the Module power supply and make sure that both frequency, voltage
and VA meet the specifications.
50 Modulation fault Internal sub-system fault.
1. Review alert messages for possible trends.
2. Correct possible problems.
3. If fault persists, replace module.
51 Pump fault
52 Motor tachometer fault
53 AC inputs phase reversed 1. Check the Module and display connections.
2. Check the Module power supply and make sure that both frequency and volt-
age meet the specifications.
3. On 24Vac applications, assure that J4-10 and J8-2 are connected together.
54 Safety GVT model ID doesn’t match
application’s model ID
55 Application configuration data block CRC
errors
56-57 RESERVED
58 Internal fault: HFS shorted to IAS Internal Fault.
1. Reset Module.
2. If fault repeats, replace module.
59 Internal Fault: Mux pin shorted
Normal Event Status
60 Internal Fault: HFS shorted to LFS
61 Anti short cycle Will not be a lockout fault. Hold Only.
62 Fan speed not proved
63 LCI OFF 1. Check wiring and correct any faults.
2. Check Interlocks connected to the LCI to assure proper function.
3. Reset and sequence the module; monitor the LCI status.
4. If code persists, replace the module.
64 PII OFF 1. Check wiring and correct any faults.
2. Check Preignition Interlock switches to assure proper functioning.
3. Check the valve operation.
4. Reset and sequence the module; monitor the PII status.
5. If code persists, replace the module.
65 Interrupted Airflow Switch OFF 1. Check wiring and correct any possible shorts.
2. Check airflow switches to assure proper functioning.
3. Check the fan/blower operation.
4. Reset and sequence the module; monitor the airflow status.
5. If code persists, replace the module.
66 Interrupted Airflow Switch ON
67 ILK OFF 1. Check wiring and correct any possible shorts.
2. Check Interlock (ILK) switches to assure proper function.
3. Verify voltage through the interlock string to the interlock input with a voltmeter.
4. If steps 1-3 are correct and the fault persists, replace the module.
68 ILK ON
69 Pilot test hold 1. Verify Run/Test is changed to Run.
2. Reset Module.
3. If fault repeats, replace module.