Harsco Industrial MACH C750 Installation & Owner's Manual page 44

5.5.11 Auto-reset Error Codes – E##
A Code Error
A01
IGNIT ERROR
A02
TOO MANY FLAME FAILURES
A03
T MAX LOCK ERROR
A05
GV RELAY ERROR
A06
SAFTEY RELAY ERROR
A09
RAM ERROR
A09
FLAG BYTE INTEGRITY ERROR
A09
AD HI CPL ERROR
A09
AD LO CPL ERROR
A09
REGISTER ERROR
A10
E2PROM ERROR
A12
WRONG EEPROM SIGNATURE
A13
STATE ERROR
A14
ROM ERROR
A15
15MS XRL ERROR
A16
20 MS XLR ERROR
A18
STACK ERROR
A19
FLAME OUT TOO LATE ERROR
A20
FLAME ERROR I
A30
HIGH GAS PRESSURE ERROR
A31
LOW GAS PRESSURE ERROR
A32
41MS ERROR
A33
FAN ERROR
A34
AIR PRESS SW NOT OPEN ERROR
A35
AIR PRESS SW NOT CLOSED ERROR
A37
UV SENSOR BROKEN
A38
MOD BACK DIFF ERROR
A39
RAPID RISE ERROR LOCK RET
A40
RAPID RISE ERROR LOCK FLOW
A41
RAPID RISE ERROR LOCK HX
A43
LOW WATER CUTOFF ERROR
A44
FLAME CKT ERROR
Int. nr Description
1 Three unsuccessful ignition attempts in a row
24 Three times flame was lost during on demand
18 Overheat stat is open
Problems with gas valve relay= internal hardware error
5
(pump not running)
Problems with gas valve relay = internal hardware error
6
(pump not running)
9 Internal software error
27 Internal software error
28 Internal software error
29 Internal software error
33 Internal software error
12 No communication with E2prom
10 Contents of Eprom is not up-to-date
13 Internal software error
14 Internal software error
16 Internal software error
22 Internal software error
19 Internal software error
20 Flame still present 10 sec. after closing the gas valve
21 Flame detected just before gas valve opened
32 Gas pressure is to high
31 Gas pressure is to low
23 Internal software issue
Fan deviation more than300 rpm longer than 1 minute (when fan
8
speed > 4200 rpm this error is ignored)
25 Air pressure switch doesn't open within 30 seconds
26 Air pressure switch doesn't close within 30 seconds
11 UV scanner not functioning
4 Large difference between return and flow temperatures
15 Return temperature rise too rapidly
7 Flow temperature rise to rapidly
17 Heat exchanger rise to rapidly
30 Water pressure is to low
34 Ionization (flame rod)wire lost for more than 15 seconds
44
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MACH Gas Fired Boiler