
- user 200L AIR SOURCE HEAT PUMP WATER HEATER instructions -
4
10 - Troubleshooting: errors, solutions and operating in case of error
N.B: Errors can be seen by briey pressing the dial
Display Error Probable causes Solutions Temporary operation measures
MEMO/BUS
• PCB defect
• Bus wire not correctly connected to
display screen
• Display screen defect
• Voltage too high on electrical
network
• Wiring error (connection to
electricity provider or moisture
sensor
• Damage during transport
• Replace main PCB
or
• Replace display screen PCB
• Appliance non-functional
t_AIR • Air temperature sensor defect
(air taken in)
• Sensor not functioning
• Sensor unplugged from PCB
• Sensor cable damaged
• Replace sensor
• Heat pump non-functional
• Electrical back-up heats water to
43°C (38°C min.)
t_defrost • Evaporator sensor defect
(de-icing temperature)
• Sensor not functioning
• Sensor unplugged from PCB
• Sensor cable damaged
• Replace sensor
• Heat pump non-functional
• Electrical back-up heats water to
43°C (38°C min.)
t_water • Tank water sensor defect
• Sensor not functioning
• Sensor unplugged from PCB
• Sensor cable damaged
• Replace sensor • Appliance non-functional
clock • Clock / timer defect
• Voltage too high on electrical
network
• Damage during transport
•1-Press ‘clock settings’ and set date
and time
•2- If the error is still there: Replace
the PCB
• Progammed heating periods are no
longer valid: the water is maintained
continuously att hes tandard set
temperature (if no signal or control
is connected to the ‘external control’
switch.
over press. •Heat pump pressure too high
• No water in tank
• Water too hot (>75°C)
• Water sensor removed from tank
• Water sensor defect
• Check that tank has been properly
purged and lled with water
• Change water sensor
• Check that the DHW* sensor is
correctly positioned in the thimble
• Heat pump non functional
• Automatic reset
• Authorised to run on back-up
freq. defro •De-icing too often
• Insucient airow
• Air inlet / outlet blocked
• Air vent duct blocked
• Pipe too long or too many elbows
• Evaporator clogged
• Set the fan to max speed (capcitor
shunted)
• Check that air is circulating properly
throughout the piping circuit
• Check pipe lengths:
-10m max. exible hose
-20m max. rigid pipes
• Check any lters on air ducts
• Check that evaporator is clean
• Heat pump non-functional
• Electrical back-up heats water to
43°C (38°C min.)
low pres. • Heat pump pressure too low
• Insucient airow
• Air inlet / outlet blocked
• Air vent duct blocked
• Ventilateur bloqué ou HS
• Evaporator clogged or blocked
• Evaporator iced over
• Check fan is running
• Check that air is circulating properly
throughout the piping circuit
• Check pipe lengths:
-10m max. exible hose
-20m max. rigid pipes
• Check any lters on air ducts
• Check that evaporator is clean
• Heat pump non-functional
• Electrical back-up heats water to
43°C (38°C min.)
overheat. • Domestic hot water over-heated
(water temperature >85°C)
• Water sensor defect
• Water sensor removed from tank
• Check that the sensor is correctly
positioned in the tank
• Heat pump non functional
• Automatic reset
ERR.01
• Incorrect readings from temperature
sensors
• Air temperature sensor and de-icing
sensor inversed on PCB
• De-icing sensor and water
temperature sensor inversed on PCB
• De-icing sensor connected to air, air
sensor connected to water, water
sensor connected to de-icing
• Reposition the temperature sensors
correctly on the main PCB
• Heat pump non-functional
• Incorrect reading from de-icing
sensor
• The de-icing sensor is positioned
incorrectly on the pipe and taking
readings from the air
• Reposition de-icing sensor to be in
contact with the pipe
• No gas left in heat pump • Leak on refrigerant circuit • Find and repair the leak before
relling refrigerant circuit
• Expansion vessel not functioning
• Thermal bulb is broken due to
intervention or being placed near a
vibrating part of the installation
• Replace expansion vessel
• Compressor not functioning and
temperature safety alert activated • Compressor too weak • Replace compressor
ERR.02 • Incorrect readings from temperature
sensors
•Air sensor and water sensor are
inversed on the PCB
• De-icing sensor is connected to
water, air sensor is connected to
de-icing
• Reposition the temperature sensors
correctly on the main PCB • Appliance non-functional
ERR.03 • Incorrect readings from temperature
sensors
• De-icing sensor is connected to
water, water sensor is connected
to air, air sensor is connected to
de-icing
• Reposition the temperature sensors
correctly on the main PCB • Appliance non-functional
ERR.04 • Incorrect readings from water and
de-icing sensors
• De-icing sensor and water sensor are
inversed on PCB
• Reposition the temperature sensors
correctly on the main PCB • Heat pump non-functional
EPR0 ALARm • Memory problem on display screen
PCB • Display screen PCB damaged • Replace the disaply screen PCB • Appliance non-functional
*DHW = Domestic Hot Water