Lennox Baltic 075 with Altivar 21 inverter OP2 fault ...

[Palkoper]

Hi Guys sorry to bother but I am so desperate to fix two brand new Lennox rooftops BAC075DNM3M made in spain last two months .

So start up everything was Ok but after 2 hours bang alarm !

On DS 60 read it fault 92 Blower inverter faulty .

Check inverter ALTIVAR 21 says OP2 fault .

Anyones know whats going On and hoew to fix it please . . . ???


I guess its problem with current cos on motor its on nameplate 18,7 amps but on inverter its set max limit only 17,5 amps .


If anyones had the same problem please let me know asap otherwise customer will kill me soon :) and lennow support in my country is totally rubbish lol.


Cheers

[chemi-cool]

try to find answers here.
http://cmcontrols.com/info/data_sheets/ATV21%20Programming.pdf

[install monkey]

OP2 Overvoltage during deceleration

check ur motor details/ input voltage frequency are programmed into the controller

[install monkey]

ALARM 091:
BLOWER OR EXHAUST FAN, FAILURE
Description
The fan motor control is no longer active.
• Alarm 091: the air conditioning fan motor or the exhaust fan motor control is no longer active,
Action
Immediate shut down of the complete unit. The alarm is signalling.
Reset
The alarm is manually reset.
Possible cause(s)
• Fire safety thermostat active
• Thermal motor protection devices activated,
• Problem with wiring connection,
• Fan motor damaged.
Remedies
• Reset the thermostat,
• Check the air system,
• Check the connection,
• Replace the fan motor.

[install monkey]

http://www.mediafire.com/view/?33dwbin5vtcbj3d
http://www.mediafire.com/view/?2lpesxj2czkej1y
manuals

[Palkoper]

Thanks a lot guys so what U recon to do first check air system or that bloody inverter will be wrong setting ???

With all Lennox rooftops without inverter driven fans never ever had those troubles ...

Thank you very much really appreciate yours time !

[install monkey]

saw 1 at a pizza hut in leicester- alarmed out on due to low speed too low and causing co2 levels to go sky high-check inverter parameters- think tb1 terminals 1 and 2 is fire alarm shutdown but that would stop the unit and no alarm,usually linked out, try increasing the setback fan speed, increase it to nearer the normal running speed then there will be less braking to get to setback speed-good luck