Lennox eNeRGy Series Installation, Operating And Maintenance page 61

MAINTENANCE DIAGNOSTIC
INDOOR FAN BLOWER
MAINTENANCE DIAGNOSTIC
FAULT
High amps on action Fan motor
High level of vibration
Unstable running and
vibration
OUTDOOR AXIAL FAN
FAULT
Circuit breaker
open
ELECTRICAL HEATER
FAULT
High Temperature trip out on
the safety thermostat of the
electric battery module
eNeRGy-IOM-2020.11-EN
POSSIBLE CAUSE AND SYMPTOMS
Pressure drop in the ducting installation too
low.
Loosening of the fan or degradation of the
silent blocks
high Fan jumping from one operating point to the
other
POSSIBLE CAUSE AND SYMPTOMS
High Amps due to a low voltage from
the main supply
High amps due to freezing of the coil
Water ingress in the motor connection
box
POSSIBLE CAUSE AND SYMPTOMS
Low airflow rate
Safety thermostat malfunction
SOLUTION
Reduce the rotation speed of the fan
Measure and estimate the airflow and pressure
and compare with the specification from
customer.
Check the fixing of the fan and transmission kit
Change rotation speed of the fan
SOLUTION
Check the voltage drop when all
components are running.
Change the circuit breaker
Adjust the defrost cycle set points
Change the component
SOLUTION
Measure and estimate the airflow and
pressure and compare with the
specification from customer.
Check the operating status of the safety
thermostat of the electric battery
module
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