Operating disturbance
Error message
Cause
Action
Sensor error inlet
P01
Sensor not connected, broken cable or
short circuit
Restart the unit. If the problem
persists, contact your dealer.
Sensor error outlet
P02
Sensor not connected, broken cable or
short circuit
Restart the unit. If the problem
persists, contact your dealer.
Sensor error outdoors
P04
Sensor not connected, broken cable or
short circuit
Restart the unit. If the problem
persists, contact your dealer.
Sensor error, evaporator
P05
Sensor not connected, broken cable or
short circuit
Restart the unit. If the problem
persists, contact your dealer.
Sensor error, suction gas
P07
Sensor not connected, broken cable or
short circuit
Restart the unit. If the problem
persists, contact your dealer.
Sensor error, hot gas
P81
Sensor not connected, broken cable or
short circuit
Restart the unit. If the problem
persists, contact your dealer.
Hot gas alarm
P82
Compressor overheated.
Restart the unit. If the problem
persists, contact your dealer.
High pressure pressostat
E01
Gas pressure too high.
Restart the unit. If the problem
persists, contact your dealer.
Low pressure pressostat
E02
Gas pressure too low.
Restart the unit. If the problem
persists, contact your dealer.
Flow switch
E03
Low flow or no water in the system
Check water flow and adjust
bypass, if any.
Too high temp. difference
between inlet and outlet
E06
Insufficient water flow, 12 °C difference
between inlet and outlet
Check water flow and adjust
bypass, if any.
Communication error
E08
No contact with the control unit
Restart the unit. If the problem
persists, contact your dealer.
Low ambient protection
step 1 in heating mode
E19
Inlet under 4 °C
and outdoor air 0 °C or colder
Restart the unit. If the problem
persists, contact your dealer.
Low ambient protection
step 2 in heating mode
E29
Inlet under 2 °C
and outdoor air 0 °C or colder
Restart the unit. If the problem
persists, contact your dealer.
Overload protection
E51
Compressor overload.
Restart the unit. If the problem
persists, contact your dealer.
10
Maintenance, service and fault tracing
Error code table
For error codes that begin with an F, contact your dealer for more information.
Low ambient protection
E07
Restart the unit. If the problem
persists, contact your dealer.
Outlet under 4°C,restarts over 8°C