Carel Hydro Solar HSS030V2LS Manuel page 47

Fault code Panel description Detail description
AL001 Too many mem Storage type variables are
AL001
writings excessively and frequently written/modifed
AL002 Retain mem write Frequent alarms for writing
AL002
error errors in storage variables
AL003 AL003 Inlet probe error Space heating temperature sensor failure
AL004 AL004 Outlet probe error Outlet probe failure
AL005 AL005 Ambient probe erro Ambient temp. probe failure
AL006 AL006 Condenser coil temp. Coil pipe probe failure
AL007 AL007 Water flow switch Water flow switch alarm
AL008 AL008 Phase sequ.prot.alarm Phase sequence protection switch alarm
AL013 AL013 Low superheat - Vlv.A EEV valve A low superheat alarm
AL028 AL028 Battery discharge EEV battery failure
AL037 BLDC-alarm:Out of
AL037 BLDC-Out of operating range
Envelope
AL038 AL038 BLDC- BLDC-compressor failed to
AL039 AL039 BLDC- BLDC-compressor failed to
AL041 BLDC-alarm:High
AL041/AL05 0 Discharge gas temp. too high protection
discarge gas temp
AL051 Power+ alarm:01-
AL051/AL05 7/AL082 Compressor 1/2 over current protection
Overcurrent
AL053 Power+ alarm:03-
AL053 Power+03-DCbus overvoltage
DCbus overvoltage
Annex "B"
Possible cause Diagnostics method
parameters modified frequently Frequently modify parameters
parameters modified frequently Frequently modify parameters
1. Loose wire / broken wire / faulty probe Visual inspection
1. Loose wire / broken wire / faulty probe Visual inspection
1. Loose wire / broken wire / broken
Visual inspection
probe
1. Loose wire / broken wire / broken probe Visual inspection
1. Strainer is blocked, resulting in increased
Smaller water flow
friction loss and a smaller water flow
2. Circulation pump is undersized Smaller water flow
3. The water pump has air pockets (either in
Smaller water flow
the impeller or in the piping around it
4. The valve of the water system is closed or
Smaller water flow
not fully opened
5. There is air in either supply or return pipe,
Smaller water flow
which leads to poor water flow
If all the above are excluded, pls short-circuit the
water flow switch and force heat pump to start. If
the outlet water temperature is more than 8
degrees above the water tank temperature, then
6. The water flow switch is broken
pls continue the above operation. If the
temperature difference is within 5 degrees and
there are no errors showed, then the water flow
switch is broken.
Abnormal parameter setting Three phase device reports failure
The unit has heavy frost Visually check for frost
The unit has been operating at low
Check unit's running frequency
frequency for a long time
The unit has strong electric interference Report fault
The water temperature is too high or the The ambient temperature or water temperature
ambient temperature is too low exceeds the allowable range
Program error Check whether the program version is the latest
Program error Check whether the program version is the latest
1. Low refrigerant charge Low pressure is very low
2. Inaccurate sensing of discharge gas temp. The discharge gas temp. probe still shows
Use a multimeter to measure the voltage during
1. The power supply voltage is low
standby, and it is 10% lower than the nominal
Measure the voltage with a multimeter at the
moment when the compressor contactor is
2. The wire diameter is too small or the wiring is
closed, until there is current protection. If the
loose, resulting in low voltage
lowest voltage displayed by the multimeter is 10%
lower than the rated voltage
3. The AC contactor of compressor is broken Visually check whether the AC contactor is closed
and not closed or not
Excluded above, measure the resistance
between the three coils of the compressor. If the
4. Short circuit of compressor coil
resistance is too small or too large, it
means that the compressor is burnt
The actual voltage exceeds 20% of the rated
Voltage is too high
voltage
Page 1 of 3
Heat Pump Troubleshooting Schedule
What to do?
Stop operating the controller for 3 minutes or
power off for 3 minutes
Stop operating the controller for 3 minutes or
power off for 3 minutes
Tighten the wire/reconnect the wire/replace the sensor
probe
Tighten the wire/reconnect the wire/replace the
probe
Tighten the wire/reconnect the wire/replace the
probe
Tighten the wire/reconnect the wire/replace the probe
Clean the strainer
Replace the water pump with a larger water
head and water flow one
Purge the air.
Open the valve
Install an automatic air vent valve at the
highest point of the piping system
Replace the water flow switch
Set DI5 of Ot6 page in M09 to normally open NO
Lower the coil temperature difference on the
Df05 sub-menu in M10
Operate within the allowable frequency range
Power off for 3 minutes and restart
Operate within the allowable range
Update the latest program
Update the latest program
Check and fix the leaks, then vacuum and
charge the refrigerant according to the
Replace discharge gas temp. probe
Increase the voltage stabilizer to keep the
voltage stable, or provide a stable voltage, or
Replace the appropriate wire diameter, or tighten loose wiring
Replace AC contactor
Replace compressor
Provide stable power supply voltage