Lennox LNINVE052 Service Manual page 58

Service Manual
Malfunction
of outdoor
12 ambient
temperature
sensor
Malfunction
of outdoor
13 condenser
temperature
sensor
Malfunction
of outdoor
14 discharge
temperature
sensor
Limit/
decrease
15 frequency
due to
overload
Decrease
frequency
16
due to
overcurrent
Installation and Maintenance
Flash
F3 3 times
every 3s
Flash
F4 4 times
every 3s
Flash
F5 5 times
every 3s
Flash
F6 6 times
every 3s
Flash
F8 8 times
every 3s
During cooling
and drying
operation,
compressor and
outdoor fan stop
□ □ ☆ ■
while indoor
fan operates.
During heating
operation, all
loads stop.
During cooling
and drying
operation,
compressor and
outdoor fan stop
□ □ ☆ □
while indoor
fan operates.
During heating
operation, all
loads stop.
During cooling
and drying
operation,
compressor and
outdoor fan stop
□ □ ☆ ☆
while indoor
fan operates.
During heating
operation, all
loads stop.
All loads
operates
normally, while
operation
■ □ ☆ ☆
frequency of
compressor
decreases.
All loads
operates
normally, while
operation
■ ■ □ ■
frequency of
compressor
decreases.
1. After de-
1.T-SENSOR
energization,
terminal hasn't
reinsert
been inserted
T-SENSOR
tightly;
terminal tightly;
2. Hardware
2. Replace
malfunction of
outdoor unit's
outdoor unit's
main board
main board;
AP1;
See
9.3(diagnosis
Refer to
of overheating
maintenance
prevention
flowchart
and overload
protection)
1. Check
Input power
whether power
voltage is too
supply network
low;
is abnormal;
Pressure of
2. Reduce
system is too
load;
high; overload
55