York DHP30NWB21SDCP30NWB21SDHP36NWB21SDCP36NWB21S Service Manual page 45

Display Method of Indoor Unit
Indicator Display (during
Malfunction
blinking, ON 0.5s and OFF
NO. Dual-8
Name
0.5s)
Code
Display
Operation
Indicator
System is
34 H4
abnormal
IPM
35 H5
protection
Module
36 temperature H5
is too high
Internal motor
OFF 3S
37 (fan motor) do H6 and blink
11 times
not operate
Desynchro-
38 nizing of H7
compressor
PFC
39 HC
protection
Outdoor DC
OFF 3S
40 fan motor L3 and blink
23 times
malfunction
OFF 3S
power
41 L9 and blink
protection
20 times
Indoor unit
OFF 3S
and outdoor
42 LP and blink
unit doesn't
19 times
match
Failure start-
43 LC
up
Display Method of Outdoor
Unit
Indicator has 3 kinds of
display status and during
blinking, ON 0.5s and OFF
0.5s
Cool Heating Yellow Red
Indicator Indicator Indicator Indicator
OFF 3S
OFF 1S
and blink and blink
6 times
4 times
OFF 3S OFF 1S
and blink and blink
5 times 4 times
OFF 3S OFF 1S
and blink and blink
5 times 10 times
OFF 3S
and blink
7 times
OFF 3S
OFF 1S
and blink and blink
14 times
6 times
OFF 1S
and
blink
14 times
OFF 1S
and blink
9 times
OFF 1S
and blink
16 times
OFF 3S
and blink
11 times
A/C status
Green
Indicator
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
Internal fan motor, external fan
motor, compressor and electric
heater stop operation,guide
louver stops at present
location.
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
Outdoor DC fan motor
malfunction lead to
compressor stop operation
Compressor stop operation
and Outdoor fan motor will
stop 30s later, 3 minutes later
fan motor and compressor will
restart
Compressor and Outdoor
fan motor don't work
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
Possible Causes
Refer to the malfunction analysis
(overload, high temperature
resistant)
Refer to the malfunction
analysis (IPM protection, loss
of synchronism protection and
overcurrent protection of phase
current for compressor.
1. Bad contact of DC motor
feedback terminal.
2. Bad contact of DC motor
control end.
3. Fan motor is stalling.
4. Motor malfunction.
5. Malfunction of mainboard rev
detecting circuit.
Refer to the malfunction
analysis (IPM protection, loss
of synchronism protection and
overcurrent protection of phase
current for compressor.
Refer to the malfunction analysis
DC fan motor malfunction or
system blocked or the connector
loosed
To protect the electronical
components when detect high
power
Indoor unit and outdoor unit doesn't
match
Refer to the malfunction analysis
38