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3.USEAGE
-73-
Failure
00 P2
Uni t worki ng st at ue
Failure
Code Type
System 2 stops
System 2 communication
protection
00 P3
Operation panel communication
protection
00 P4
This failure happens when a external master unit is used
to control the heat pump unit via Modbus.
Communication data lost too much. Check whether
communication cable is correctly connected; check
whether communication cable is longer than 30M;
whether there has a source of the disturbance nearby
the unit. Unit recovers when communication recovers.
Master unit communication
protection
00 P5
1.
Check whether set temperature for cooling is too low;
whether system has too small water flow rate; check
water system especially the filter.2.Check whether
system has not enough refrigerant inside by measuring
the evaporating pressure. 3.Check whether ambient
temperature is lower than 15
℃
.
System 2 indoor anti-freezing
protection in cooling
Possible Reasons And Solutions
Communication data lost too much. Check whether
communication cable is correctly connected; check
whether communication cable is longer than 30M;
whether there has a source of the disturbance nearby
the unit. Unit recovers when communication
recovers.2.For single compressor system, please
check whether number 6, 7, and 8 the dip-switch
JNP401 setting on outdoor PCB are set to "001".
3.For dual compressor system, if only system 2 has
this failure and the dip-switch setting is OK, then
please try with a new outdoor power PCB.
Communication data lost too much. Check whether
communication cable is correctly connected; check
whether communication cable is longer than 30M;
whether there has a source of the disturbance nearby
the unit. Replace the operation panel or indoor PCB
if necessary. Unit recovers when communication
recovers.
If a external control
unit is connected and
have communication,
unit keeps on working;
if no external control
unit is connected,
unit stops.
Unit stops only when
external master
controller is connected
and activated,
otherwise unit keeps on
working with the currect
setting.
Compressor of system 2
speed down or stop. If
this failure doesn't
recover automatically
after 3 minutes, it must
have happened over
3 times in a certain
period of time. If so, it
can only be recovered
by repowering the unit.
00 P1
00 Ec
System 1 communication
protection
Compressor stops
System 1 stops
Too small water flow rate
failure
If system water flow rate too small protection, 00P7,
happens over 3 times in certain periof of time, unit
gives this failure code and can only be reset by
repower the unit. Check the water system, especially
the filter; check the working statue of water pump.
Communication data lost too much. Check whether
communication cable is correctly connected; check
whether communication cable is longer than 30M;
whether there has a source of the disturbance nearby
the unit. Unit recovers when communication recovers.
2.For single compressor system, please check whether
number 6, 7, and 8 the dip-switch JNP401 setting on
outdoor PCB are set to "0". 3.For dual compressor
system, if only system 1 has this failure and the
dip-switch setting is OK, then please try with a new
outdoor power PCB.
Indoor Unit Failure Codes