Troubleshooting
6-8
750-437
Q Series Full Modulation
18
Any #
Air pressure failure (speed-dependent air
pressure switch)
A fault occurred related to the speed-dependent air pressure switch. See diagnostic codes
for more information.
0
Air pressure switch off
When using a speed-dependent air pressure switch, the switch must be closed anytime the
VSD speed is greater than the setting of parameter 671.
1
Air pressure switch on
When using a speed-dependent air pressure switch, the switch must be open anytime the
VSD speed is less than the setting of parameter 670.
128
Invalid parameterization
Check the settings of parameters 670 and 671. Parameter 671 must be set to a higher
value than parameter 670.
19
80
Combustion pressure, POC - start
prevention
Check wiring and operation of combustion pressure switch.
20
Any #
Pressure switch-min (Pmin)
A fault occurred related to the low gas pressure switch. See diagnostic codes for more
information.
0
No minimum gas pressure
The low gas pressure switch (input X5-01.2) opened, causing a fault. Check gas supply
and open any manual shutoff valves. Check the setpoint and wiring of the low gas pressure
switch.
1
Gas shortage / prevention of startup
The low gas pressure switch was not made by the end of phase 22, preventing the startup
of the LMV3. See diagnostic code 0 for more corrective actions.
21
Any #
Pressure switch-max (Pmax) / POC
A fault occurred related to the high gas or oil pressure switch (or POC if using an LMV3 with
a software version V02.00). See diagnostic codes for more information.
0
Pressure switch-max (Pmax): Maximum
gas / oil pressure exceeded. POC: POC
open (software version V02.00)
The high gas / oil pressure switch (input X5-02.2) opened, causing a fault. Check the
setpoint and wiring of the high gas / oil pressure switch. Check pressure regulators for
ruptured diaphragms. If using an LMV3 with a software version V02.00, this could be a
POC fault if parameter 237 is set for 2. If so, see corrective action of error code 14,
diagnostic 0.
1
POC closed (software version V02.00) Only appears if using an LMV3 with a software version V02.00: See corrective action of
error code 14, diagnostic 1.
64
POC open - start prevention (software
version V02.00)
Only appears if using an LMV3 with a software version V02.00: See corrective action of
error code 14, diagnostic 64.
Error
Code Diag. Code Description
Corrective Action
Note: Diagnostic codes are additive. If a diagnostic code appears that is not on this list, it is a combination of multiple diagnostic codes.
Содержание ProFire Q Series
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