Lennox LNINVE052 Service Manual page 57

Blockage
9 protection of H6
indoor unit
Malfunction
10 protection of C5
jumper cap
Indoor
fan circuit
malfunction
11 U8
by zero
cross
detection
54
Flash
11 times
every 3s
Flash
15 times
every 3s
Flash
17 times
every 3s
Feedback
terminal of PG
motor hasn't been
inserted tightly.
Indoor fan,
outdoor fan,
Control terminal
compressor
of PG motor
and electric
is not inserted
heating
tightly.
tube all stop
operation;
Fan is blocked
horizontal
louver stops
Malfunction of
at current
motor.
position.
Circuit
malfunction of
main board.
Jumper cap
hasn't been
inserted on main
board.
Operation
Jumper cap
of remote
hasn't been
controller or
inserted correctly
control panel
and tightly.
is available,
but the unit
Jumper cap is
won't act.
damaged.
Circuit of
main board is
abnormal.
1. Discharging
speed of
capacitor is slow,
which lead to
wrong judgement
Operation
of controller.
of remote
controller or
control panel
is available,
but the unit
Zero-crossing
won't act.
detection circuit
of main board is
abnormal
Installation and Maintenance
Service Manual
Refer to
maintenance
flowchart
Refer to
maintenance
flowchart
Refer to
maintenance
flowchart