Carrier 619FB Service Manual page 19

Display Method of Indoor Unit
Malfunction
Dual-8
No.
Indicator Display (during blinking,
Name
Code
Display
Operation
Indicator
High pressure
1 protection of E1
system
Anti-freezing
2 E2
protection
Refrigerant
3 leakage F0
protection
High discharge
temperature
4 E4
protection of
compressor
Overcurrent
5 E5
protection
Communication
6 E6
Malfunction
High
temperature
7 E8
resistant
protection
EEPROM
8 EE
malfunction
Limit / decrease
frequency due to
9 EU
high temp. of
module
Malfunction
10 protection of C5
jumper cap
Gathering
11 Fo
refrigerant
Indoor ambient
temperature
sensor is
12 F1
open/short
circuited
Indoor
evaporator
temperature
13 F2
sensor is
open/short
circuited
Outdoor ambient
temperature
14 sensor is F3
open/short
circuited
Outdoor
condenser
temperature
15 F4
sensor is
open/short
circuited
Display Method of Outdoor Unit
Indicator has 3 kinds of display
status and during blinking, ON 0.5s
ON 0.5s and OFF 0.5s)
Cool Heating Yellow
Indicator Indicator Indicator
OFF 1S
and blink3
times
OFF 1S
and blink
7 times
OFF 1S
and blink
5 times
Always
OFF 1S
and blink
6 times
OFF 1S
and blink
11 times
OFF 1S
and
blink17
times
A/C Status
and OFF 0.5s
Red Green
Indicator Indicator
During cooling and drying
operation, indoor fan operates,
all modes stop operation.
During heating operation, the
unit stops.
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates.
OFF 1S
The Code Display displays F0
and blink
and the complete unit stops.
9 times
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates. During heating
operation, all modes stop.
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates. During heating
operation, all modes stop.
During cooling operation,
compressor stops while indoor
fan motor operates. During
heating operation, the
complete unit stops.
During cooling operation:
compressor stops while indoor
fan operates. During heating
operation, the complete unit
stops.
During cooling and drying
operation, compressor stops
while indoor fan operates.
During heating operation, the
complete unit stops
All modes operate normally,
while operation frequency for
compressor is decreased
Wireless remote receiver and
button are effective, but can
not dispose the related
command
When the outdoor unit
receives signal of gathering
refrigerant, the system is
forced to run under cooling
mode for gathering refrigerant
During cooling and drying
operation, indoor unit operates
while other modes stop; during
heating operation, the
complete unit stops operation.
AC stops operation once
reaching the setting
temperature. Cooling, drying:
internal fan motor stops
operation while other modes
stop operation; heating: AC
stop operation
During cooling and drying
OFF 1S operating, compressor stops
and blink while indoor fan operates;
6 times During heating operation,the
complete unit stops operation
During cooling and drying
OFF 1S operation, compressor stops
and blink while indoor fan operates;
5 times During heating operation, the
unit stops operation.
19
Possible Causes
Possible reasons:
1. Refrigerant was overcharged ;
2. Poor heat exchange (including
blockage of heat exchanger
3. Ambient temperature is too high
1. Poor air-return in indoor unit;
2. Fan speed is abnormal;
3. Evaporator is dirty.
1. Refrigerant leakage;
2. Indoor evaporator temperature
sensor not working;
3. The unit has a restriction in the
piping.
Refer to the malfunction analysis
(discharge protection, overload).
1. Supply voltage is unstable;
2. Supply voltage is too low and
load is too high;
3. Evaporator is dirty.
Refer to the corresponding
malfunction analysis.
Refer to the malfunction analysis
(overload, high temperature
resistant).
Replace outdoor control panel AP1
Discharging after the complete unit
is de-energized for 20mins, ensure
the thermal grease on IPM Module
of the outdoor control panel AP1 is
sufficient. If is no use, replace the
control panel AP1.
1. No jumper cap insert on
mainboard.
2. Incorrect insert of jumper cap.
3. Jumper cap damaged.
4. Abnormal detecting circuit of
mainboard.
Nominal cooling mode
1. Loosening or bad contact of
indoor ambient temp. sensor and
mainboard terminal.
2. Indoor ambient temp. sensor
damaged.(check with sensor
resistance value chart)
3. Mainboard damaged.
1. Loosening or bad contact of
Indoor evaporator temp. sensor
and mainboard terminal.
2. Components on the mainboard
fail and lead to a short circuit..
3. Indoor evaporator temp. sensor
damaged.(check temp. sensor
value chart for testing)
4. Mainboard damaged.
Outdoor temperature sensor has
not been connected well or is
damaged. Check it by referring to
the resistance table for
temperature sensor)
Outdoor temperature sensor has
not been connected well or is
damaged. check it by referring to
the resistance table for
temperature sensor)