H2O Manual | 13
Error
Name
Description
Action
0
No Error
System normal
N/a
1
Display error
LED fault
detedcted
Return for repair
2
PV over voltage
DC input voltage
too high
Too many PV
panels
3
PV leakage de-
tected
RCM has detected
leakage current
Check for electrical
faults
4
Water over temp
Oveer max
tempreture de-
tected
Return for repair
5
No temp probe
detected
Tempreture probe
is not connected
Connect probe
6
Temp error
Implausible
tempreture reading
Check probe
installation
7
Safety cut out
activated
Temp or RCM
safety active
Check for faults
8
Termal cutout
Max tempreture
limit
Check system
9
Element fault
Element fault
detected
Check element
10
Internal fault
Internal fault
detected in H2O
Return for repair
Basic use cases (off-grid installation)
»
When sufficient solar power is available
H2O will be on and can heat.
»
When insufficient solar power is available
H2O will be off and will not heat.
6.3 Default settings
The H2O can work directly out of the box with
no further settings or internet connection.
The factory temperature settings are as follows
and cannot be changed without connecting
the H2O to the internet and the user app (see
section 7):
AC setpoint
55°C
Solar setpoint
55
°C
Boost setpoint
55
°C
Note:
it is recommended that an internet
connection is used and commissioned as it
enables full diagnostics and configuration of the
device.
6.4 Led status indicators
The H2O uses the front panel LEDs to indicate
its status. 4 Multicolour indicators are used and
their colours designate the following possible
statuses:
Temp LED Solar LED
Grid LED
Status LED
(2 colour flash)
Heating
Solar heating Grid heating Normal
AP mode
At setpoint Grid mode
Solar mode
Normal
Wifi connected
Cooling
Solar off
Grid off
Error
AP mode
Error
Wifi connected
6.5 fault finding
If the H2O does not work correctly or displays
a fault is present with the Status LED, it is
necessary to correct an abnormal occurrence.
All error status messages are available in the
User App. Once an error is corrected, reset the
fault by turning off / on both PV and AC together.
The following table shows monitored faults
which can occur and possible solutions:
6.6 Other errors
Besides the errors specifically listed above, the
following errors may also occur:
Fuses:
The Synapse H2O has 2 fuses inside, 1 each
for the AC and DC supplies. Should either
supply fail to correctly power up the unit, check
these 2 fuses on the main board. (See Figures
6 and 7 below).
Figure 8. AC Fuse
Figure 9. DC Fuse
