ES AWH11-V5+, User Manual

Page: 60 / 86

3. Usage
60
3.6 Error code
Code Uni t worki ng stat ue Type
01(02) P1
01(02) P2
01(02) P3
01(02) P4
Failure
Main line current protection
Comprssor stops
Comprssor stops
Comprssor stops
Comprssor stops
Comprssor stops
Input current too high or too low, or system works in
over-load condition. Unit recovers automatically after
5 minutes when it happened the first time. If same
failure happened 3 times in a certain period of time,
unit stops until repowered. Check unit input current.
Check whether fan motor and water pump is working
OK; whether condensor is blocked; whether water
temperature too high, and whether water inlet&outlet
temperature has too big difference (should no bigger
than 8
℃
)
Compressor phase current
protection
Compressor input current too high or too low, or system
works in over-load condition. Check compressor input
current. Check whether fan motor and water pump is
working OK; whether condensor is blocked; whether
water temperature too high, and whether water inlet&
outlet temperature has too big difference (should no
bigger than 8
℃
)
IPM module protection
Compressor drive failure. Check whether cable is
broken or loosen. Check whether compressor driver
PCB or compressor is broken.
If unit has been continuously working in low speed for
certain period of time, unit starts this protection to suck
compressor oil back into compressor. This is a normal
protection and doesn't need any treatment.
Compressor oil return
protection
Compressor speed up
01(02) P5
If system pressure is too high or too low, it activates this
protection. Unit recovers automatically after 5 minutes
when it happened the first time. If same failure happened
3 times in a certain period of time, unit stops until
repowered (with 01(02) F7 failure code also shown on
the display). Check whether fan motor and water pump
is working OK; whether condensor is blocked; whether
water temperature too high, and whether water
inlet&outlet temperature has too big difference
(should no bigger than 8
℃
)
Compressor shut down due to
high pressure switch (or low
pressure switch, if have) open
caused by abnormal high/low
pressure
01(02) P6
This protection happens when system pressure is higher
than the set compressor speed-down pressure point. If
after slow down the compressor speed but pressure still
higher than the protection point, compressor stops.
Check whether water temperature set value is too high;
whether system water flow rate too small; whether EEV
works normally; whether air circulates fluently in cooling
mode; whether water inlet&outlet temperature has too big
difference (should no bigger than 8
℃
). If this failure
happens over three times in a certain period of time, it
will cause 01(02) FC failure.
Compressor speed down due to
abnormal high pressure
detected by condensing
pressure sensor
01(02) P7
This is a normal protection and doesn't need any
treatment. When compressor did not work for long time
and ambient temperature is low (below -5
℃
),
compressor crankcase heater work for 30 mins and stops.
Compressor preheating
Standard function,
doesn't need any
treatment.
01(02) P8
Compressor discharge temp.
too high protection
Check whether water temperature set value is too high,
especially when ambient temperature is low; whether
water flow rate too small; whether system is lacking of
enough refrigerant.
Protection
Possible Reasons And Solutions
Comprssor stops
Outdoor Unit Failure Codes.
01 or 02 stands for different compressor systems. For sigle compressor system,
it indicates the failure of outdoor unit no matter 01 or 02 is shown.