Submittal Sheet

7800 SERIES S7800A2142 KEYBOARD DISPLAY MODULE
32-00110—05 64
7800 SERIES Fault Codes
Table 22 is a complete list of fault codes that may appear
in the fault code register. The Fault String Code register
will contain the corresponding String code identified in
the table.
169 Terminal T17 = 1
170 Terminal T18 = 0
171 Terminal T18 = 1
172 Terminal T19 = 0
173 Terminal T19 = 1
174 Terminal T20 = 0
175 Terminal T20 = 1
176 Terminal T21 = 0
177 Terminal T21 = 1
178 Jumper 1 Intact
179 Jumper 1 Clipped
180 Jumper 2 Intact
181 Jumper 2 Clipped
182 Jumper 3 Intact
183 Jumper 3 Clipped)
NOTE: The values that follow are generated when the
fault code is zero and the Expanded Annunciator
code indicates that one or more switches are
open. The Line 2 string code will indicate which
switch is open.
184 STANDBY HOLD (EA)
185 PURGE HOLD (EA)
186 PILOT HOLD (EA)
187 MAIN IG HOLD (EA)
188 RUN HOLD (EA)
189 POSTPURGE HOLD (EA)
190 PRE-IGNITION HOLD (EA)
191 -SKIPPED-
192 DEMAND T6 = 0
193 DEMAND T6 = 1
194 PILOT VALVE T8 = 0
195 PILOT VALVE T8 = 1
196 INTERMIT PV T8 = 0
197 INTERMIT PV T8 = 1
198 MAIN VALVE1 T9 = 0
199 MAIN VALVE1 T9 = 1
200 VP SWITCH T16 = 0
201 VP SWITCH T16 = 1
202 MAIN VALVE2 T17 = 0
203 MAIN VALVE2 T17 = 1
204 INTRUPTD PV T21 = 0
205 INTRUPTD PV T21 = 1
206 DELAYED MV T21 = 0
207 DELAYED MV T21 = 1
208 START SW T21 = 0
209 START SW T21 = 1
210 VP START
Table 21. 7800 SERIES String codes. (Continued)
String Code String
211 VP MV2 ON
212 VP LOW DLY
213 VP LOW TST
214 VP MV1 ON
215 VP HIGH DLY
216 VP HIGH TST
217 VP SETUP NEEDED
218 MAIN VALVE 1 OFF
219 MAIN VALVE 2 OFF
220 MAIN VALVE 1 ON
221 MAIN VALVE 2 ON
222 VPS OFF
223 VPS ON
Table 22. 7800 SERIES Fault Codes.
Fault
Code
(Reg
40001)
Fault Message
(NOTE: FAULT n: is not in
the Fault and Strings Code)
Fault
String
Code
(Table
22)
0 Blank (no fault) 0
1FAULT 1: NO PURGE CARD 73
2 FAULT 2: AC FREQUENY/NOISE 8
3 FAULT 3: AC LINE DROPOUT 9
4 FAULT 4: AC FREQUENCY 7
5 FAULT 5: LOW LINE VOLTAGE 60
6 FAULT 6: PURGE CARD ERROR 88
7 FAULT 7: FLAME AMPLIFIER 34
8 FAULT 8: FLAME AMP/SHUTR 33
9 FAULT 9: FLAME DETECTED 35
10 FAULT 10: PRE-IGNITION ILK 85
11 FAULT 11: RUNNING ILK ON 100
12 FAULT 12: LOCKOUT ILK ON 53
13 FAULT 13: AIRFLOW SW. ON 12
14 FAULT 14: HIGH FIRE SWITCH 40
15 FAULT 15: FLAME DETECTED 35
16 FAULT 16: FLAME-OUT TIMER 37
17 FAULT 17: MAIN FLAME FAIL 64
18 FAULT 18: FLAME DETECTED 35
19 FAULT 19: MAIN FLAME IGN. 65
20 FAULT 20: LOW FIRE SW OFF 57
21 FAULT 21: RUNNING ILK 99
Table 21. 7800 SERIES String codes. (Continued)
String Code String