MAXA BDS28A, Technical Manual

Page: 17 / 36

17
10
Malfunction
protection of
jumper cap
C5
Blinks 15
times
Wireless remote
receiver and button
are effective, but can
not dispose the
related command
1. No jumper cap
insert on mainboard.
2. Incorrect insert of
jumper cap.
3. Jumper cap
damaged.
4. Abnormal detecting
circuit of mainboard.
11
Gathering
refrigerant
F0
Blinks 1
time Blinks
1 time Blinks 17
time
When the outdoor unit
receive signal of
Gathering refrigerant,
the system will be
forced to run under
cooling mode for
gathering refrigerant
Nominal cooling mode
12
Indoor
ambient
temperature
sensor is
open/short
circuited
F1
Blinks
once
- During cooling and
drying operation,
indoor unit operates
while other loads will
stop.
- During heating
operation, the
complete unit will
stop operation.
1. Indoor ambient
temperature sensor
hasn’t been
connected well with
indoor unit’s control
panel AP1 (refer to
the wiring diagram for
indoor unit).
2. Room temperature
sensor is damaged
(refer to the
resistance table of
temp. sensor
appendix 1)
3 Mainboard
damaged
13
Indoor
evaporator
temperature
sensor is
open/short
circuited
F2
Blinks
twice
- During cooling and
drying operation,
indoor unit will
operate while other
loads will stop;
- During heating
operation, the
complete unit will stop
operation.
1. Evaporator temp.
sensor hasn’t been
connected well with
indoor unit’s control
panel AP1 (refer to
the wiring diagram for
indoor unit).
2. Evaporator temp.
sensor is damaged
(please refer to the
resistance table of
temp. sensor).
14
Outdoor
ambient
temperature
sensor is
open/short
circuited
F3
Blinks 3
times Blinks 6
times
- During cooling and
drying operating,
compressor stops
while indoor fan
operates;
- During heating
operation, the
complete unit will
stop operation 1. Outdoor ambient
temp. sensor hasn’t
been connected well
or is damaged.
2. Please check it by
referring to the
resistance table for
temperature sensor
appendix 1).
15
Outdoor
condenser
temperature
sensor is
open/short
circuited
F4
Blinks 4
times Blinks 5
times
- During cooling and
drying operation,
compressor stops
while indoor fan will
operate;
- During heating
operation, the
complete unit will
stop operation. 1. Condenser temp.
sensor hasn’t been
connected well or is
damaged.
2. Please check it by
referring to the
resistance table for
temperature sensor
appendix 2)
16
Outdoor
discharge
temperature
sensor is
open/short
circuited
F5
Blinks 5
times Blinks 7
times
- During cooling and
drying operation,
compressor will sop
after operating for
about 3 minutes,
while indoor fan will
operate;
- During heating
operation, the
complete unit will
stop after operating
for about 3 minutes. 1. Outdoor discharge
temp. sensor hasn’t
been connected well
or is damaged. Please
check it by referring to
the resistance table
for temp. sensor
appendix 3).
2. The head of temp.
sensor hasn’t been
inserted into the
copper tube.
17
Limit/decrease
frequency due
to overload
F6
Blinks
6 times Blinks 3
times
All loads operate
normally, while
operation frequency
for compressor is
decreased Refer to the
malfunction analysis
(overload, high
temperature
resistant).
18
Decrease
frequency due
to overcurrent
F8
Blinks
8 times Blinks
once
All loads operate
normally, while
operation frequency
for compressor is
decreased
The input supply
voltage is too low;
System pressure is
too high and overload.