Troubleshooting – Lochinvar 1.5 User Manual
Page 19
19
ModBus Instructions
Lockout Codes
Description
5
=
Analog to Digital converter input had changed too quickly
7
=
Rapid Temperature Change on Pre-Mix Sensor 2 (S14)
8
=
Rapid Temperature Change on Pre-Mix Sensor 1 (S13)
9
=
Rapid Temperature Change on Pre-Mix Sensor 2 (S12)
10
=
Rapid Temperature Change on Pre-Mix Sensor 1 (S11)
11
=
Analog to Digital converter input is changed too quickly
12
=
Rapid Temperature Change on Flue Sensor (S10)
13
=
Rapid Temperature Change on Outlet Sensor (S9)
15
=
Rapid Temperature Change on System Return Sensor (S7)
16
=
Rapid Temperature Change on System Supply Sensor (S6)
17
=
Rapid Temperature Change on Tank Sensor (S4)
18
=
Rapid Temperature Change on Flue Sensor (S3)
19
=
Rapid Temperature Change on Inlet Sensor (S2)
20
=
Rapid Temperature Change on Outlet Sensor (S1)
25
=
Pre-Mix Sensor 2 (S14)-Short
26
=
Pre-Mix Sensor 1 (S13)-Short
27
=
Pre-Mix Sensor 2 (S12)-Short
28
=
Pre-Mix Sensor 1 (S11)-Short
29
=
Flue Sensor (S10)-Short
30
=
Outlet Sensor (S9) – Short
32
=
System Return Temperature Sensor (S7) – Short
33
=
System Supply Temperature Sensor (S6) – Short
34
=
Tank Sensor (S4) – Short
35
=
Flue Sensor (S3) – Short
36
=
Inlet Sensor – Short
37
=
Outlet Sensor (S1) – Short
38
=
Temperature Measurement Error 2
39
=
Temperature Measurement Error 1
45
=
High temperature differential between S12 and S14
46
=
High temperature differential between S11 and S13
48
=
High temperature differential between S3 and S10
49
=
High temperature differential between S1 and S9
50 =
Internal
Error
129
=
Large Pre-Mix Temperature High
130
=
Small Pre-Mix Temperature High
134
=
Louvers Not Open
135
=
Louvers Not Closed
137
=
Large Blower Proving Switch Not Closed
139
=
Large Blower Proving Switch Not Open
140
=
Small Blower Proving Switch Not Open
145
=
Large Blower Proving Switch Not Closed
146
=
Small Blower Proving Switch Not Closed
148
=
Large Blower Proving Switch Not Open
149
=
Large Fan Speed Too Low
150
=
Large Fan Speed Too High
163
=
Wrong Personality Plug
164
=
Flame Current Circuit Failed
166
=
Auto Reset High Limit
167
=
Blocked Drain Switch Open
169
=
Gas Pressure Switch Open
170
=
Low Water Cut-Off Open
177
=
Flue Sensor Short
178
=
Flue Sensor Open
179
=
Inlet Sensor Short
180
=
Inlet Sensor Open
6
Troubleshooting
(continued)