Carrier 619FB Service Manual page 20

Dual-8
Malfunction Operation
No. Code
Name Indicator
Display
Outdoor
discharge
temperature
16 F5
sensor is
open/short
circuited
Limit/ decrease
17 frequency due to F6
overload
Decrease
18 frequency due to F8
over-current
Decrease
frequency due to
19 F9
high air
discharge
Limit/ decrease
20 frequency due to FH
anti freezing
Voltage for DC is
21 PH
too high
Voltage of DC is
22 PL
too low
Compressor Min
23 frequence in test P0
state
Compressor
24 rated frequence P1
in test state
Compressor
maximum
25 P2
frequence in test
state
Compressor
intermediate
26 P3
frequence in test
state
Overcurrent
protection of
27 P5
phase current for
compressor
Charging
28 malfunction of PU
capacitor
Malfunction of
module
29 P7
temperature
sensor circuit
Module high
30 temperature P8
protection
Decrease
frequency due to
high temperature
31 H0
resistant during
heating
operation
Static de-dusting
32 H2
protection
Overload
33 protection for H3
compressor
System is
34 H4
abnormal
Cool Heating Yellow
Indicator Indicator Indicator Indicator
OFF 1S
and blink
7 times
OFF 1S
and blink
3 times
OFF 1S
and blink
OFF 1S
and blink
OFF 1S
and blink
4 times
OFF 1S
and blink
8 times
OFF 1S
and blink
6 times
Red Green
AC Status
Indicator
During cooling and drying
operation, compressor stops
after operating for about 3
mins, while indoor fan
operates. During heating
operation, the complete unit
stops after 3 mins.
All loads operate normally,
while operation frequency for
compressor is decreased
All loads operate normally,
while operation frequency for
once compressor is decreased
All modes operate normally,
while operation frequency for
twice compressor is decreased
All modes operate normally,
while operation frequency for
compressor is decreased
During cooling and drying
operation, compressor stops
while indoor fan operates.
During heating operation, the
unit stops operation.
During cooling and drying
operation, compressor will
stop while indoor fan will
operate; During heating
operation, the complete unit
will stop
During cooling and drying
operation, compressor stops
while indoor fan operates;
During heating operation, the
unit stops operation.
During cooling and drying
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.
During cooling operation,
compressor will stop while
indoor fan will operate;
During heating operation, the
complete unit will stop
All modes operate normally,
while operation frequency for
compressor is decreased
During cooling and drying
operation, compressor stops
while indoor fan operates.
During heating operation, the
complete unit stops operation.
During cooling and drying
operation, compressor stops
while indoor fan operates.
During heating operation, the
complete unit stops operation.
20
Possible Causes
1.Outdoor temperature sensor has
not been connected well or is
damaged. Check it by referring to
the resistance table for
temperature sensor)
2.The head of temperature sensor
has not been inserted into the
copper tube
Refer to the malfunction analysis
(overload, high temperature
resistant)
The input supply voltage is too
low. System pressure is too high.
Temperature is too high;
Malfunction of electric expansion
valve (EKV)
Poor air-return in indoor unit or fan
speed is too low
1. Measure the voltage on
terminals L2 and S on terminal
block, if the voltage is higher than
265VAC, turn on the unit
2. If the AC input is normal,
measure the voltage of electrolytic
capacitor C on control panel (AP1)
if its normal, there is a malfunction
in the circuit, replace the control
panel (AP1)
1. Measure the voltage of position
L2 and S on terminal block, if the
voltage is higher than 150VAC,
turn on the unit.
2. If the AC input is normal,
measure the voltage of electrolytic
capacitor C on control panel
(AP1), if normal, there is a
malfunction on the circuit, replace
the control panel (AP1)
Showing during min. cooling or
min. heating test
Showing during nominal cooling or
nominal heating test
Showing during middle cooling or
middle heating test
Showing during middle cooling or
middle heating test
Refer to the malfunction analysis
(IPM protection, loss of
synchronism protection and over
current protection of phase current
for compressor.
Refer to the part three—charging
malfunction analysis of capacitor
Replace outdoor control panel AP1
After the complete unit is de-
energized for 20mins, ensure the
thermal grease on IPM Module of
AP1 is sufficient. If not, replace
control panel AP1.
Refer to the malfunction analysis
(overload, high temperature
resistant)
1. Wiring terminal OVC-COMP is
loosened. In normal state, the
resistance for this terminal should
be less than 1ohm.
2.Refer to the malfunction analysis
(discharge protection, overload)
Refer to the malfunction analysis
(overload, high temperature
resistant)