Siemens LMV 5 Series, Technical Instructions, Page: 223 / 374

LMV Series Technical Instructions
Document No. LV5 ‐ 1000
SCC Inc. Page 15 Section 7
Ambient or Stack Temperature Sensor Reading Incorrectly
If the ambient or stack temperature sensor wired into the PLL52 are not reading (displayed as
“XXXX” on the AZL screen), or the sensors are reading incorrectly, check the following:
1. Ensure that the sensors are wired into the PLL52 module correctly. See Section 2 to verify
proper wiring.
2. Both sensors must be a 2 ‐ wire, 1000 Ohm, platinum or nickel RTD. Check to see that the
sensors are activated and properly configured under the following menu paths:
Params & Display > O2 Module > Configuration > SupAirTempSens
Params & Display > O2 Module > Configuration > FlueGasTempSens
Note: The ambient and stack temperature sensors are not necessary for O
2
trim. However, if
one or both inputs are configured for a sensor and either sensor is not reading, the O
2
trim will not activate.
AZL Says “ O2 Module not active or not Available ”
If the AZL displays the message “O2 Module not active or not Available” when trying to access
one of the following menus, the LMV52 has lost communication with the PLL52 O
2
module.
Params & Display > O2Contr/Alarm ‐ or ‐
Params & Display > O2 Module
Check the CANbus wiring between the LMV52 and the PLL52. See Section 2 for wiring
assistance. Once communications have been re ‐ established, access to the O
2
menus will be
allowed.
To deactivate the O
2
module entirely, use the following menu path:
Params & Display > SystemConfig > O2Ctrl/LimitrGas(Oil) = man deact
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