Lennox LNINVC052, Руководство по обслуживанию

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