TROUBLESHOOTING

To support the recommended Troubleshooting, the R7910 has an Alert File. Review the Alert history for possible trends that may have been occurring prior to the actual Lockout.

Note Column: H= Hold message; L=Lockout message; H or L= either Hold or Lockout depending on Parameter Configuration.

Table 24.  TROUBLESHOOTING CODES

CODE

DESCRIPTION

RECOMMENDED TROUBLESHOOTING OF

NOTE

 

 

 

LOCKOUT CODES

 

 

Safety Data Faults

 

 

 

1

Unconfigured safety data

1. New Device, complete device configuration and

L

 

 

 

safety verification.

 

 

 

2. If fault repeats, replace module.

 

2

Waiting for safety data verification

1. Device in Configuration mode and safety

L

 

 

 

parameters need verification and a device needs

 

 

 

 

reset to complete verification.

 

 

 

2. Configuration ended without verification, re enter

 

 

 

 

configuration, verify safety parameters and reset

 

 

 

 

device to complete verification.

 

 

 

3.

If fault repeats, replace module.

 

 

Internal Operation Errors

 

 

 

3

Internal fault: Hardware fault

Internal Fault.

H

 

 

1.

Reset Module.

 

4

Internal fault: Safety Relay key feedback error

H

2.

If fault repeats, replace module.

5

Internal fault: Unstable power (DCDC) output

H

 

 

6

Internal fault: Invalid processor clock

 

 

H

7

Internal fault: Safety relay drive error

 

 

H

8

Internal fault: Zero crossing not detected

 

 

H

9

Internal fault: Flame bias out of range

 

 

H

10

Internal fault: Invalid Burner control state

 

 

L

11

Internal fault: Invalid Burner control state flag

 

 

L

12

Internal fault: Safety relay drive cap short

 

 

H

 

 

 

 

 

13

Internal fault: PII shorted to ILK

 

 

H or L

14

Internal fault: HFS shorted to LCI

 

 

H or L

15

Internal fault: Safety relay test failed due to

 

 

L

 

feedback ON

 

 

 

16

Internal fault: Safety relay test failed due to safety

 

 

L

 

relay OFF

 

 

 

17

Internal fault: Safety relay test failed due to safety

 

 

L

 

relay not OFF

 

 

 

18

Internal fault: Safety relay test failed due to

 

 

L

 

feedback not ON

 

 

 

19

Internal fault: Safety RAM write

 

 

L

20

Internal fault: Flame ripple and overflow

 

 

H

21

Internal fault: Flame number of sample mismatch

 

 

H

22

Internal fault: Flame bias out of range

 

 

H

23

Internal fault: Bias changed since heating cycle

 

 

H

 

starts

 

 

 

24

Internal fault: Spark voltage stuck low or high

 

 

H

25

Internal fault: Spark voltage changed too much

 

 

H

 

during flame sensing time

 

 

 

26

Internal fault: Static flame ripple

 

 

H

27

Internal fault: Flame rod shorted to ground

 

 

H

 

detected

 

 

 

28

Internal fault: A/D linearity test fails

 

 

H

29

Internal fault: Flame bias cannot be set in range

 

 

H

61

Page 61
Image 61
A.O. Smith 2600, 3400, 1700, 2000 instruction manual Code Description Recommended Troubleshooting Lockout Codes

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