Worcester CDi Combi N.G Service Booklet page 65

Information displayed
( items 1, 3 and 4 in Fig.
Text
Fault 50
Solar pump jammed or air in system
Fault 51
Incorrect temperature sensor type
connected
Fault 52
Temperature sensors reversed
Fault 53
Temperature sensor fitted in wrong
location
Fault 54
Temperature for thermal disinfection
not reached in solar cylinder
Fault 55
Solar system not yet commissioned
Fault 56
At least one pump/valve in manual
mode
Tab. 32
8 716 115 748 (2009/09)
Supplied By www.heating spares.co Tel. 0161 620 6677
)
17
Code Cause
121 Solar pump (SP) sticking due to
physical blockage.
Air in solar thermal system.
122 Collector temperature sensor type
used as cylinder temperature
sensor (T
123 Cylinder temperature sensor type
used as collector temperature
sensor (T
132 Temperature sensor type PTC
1000 used as cylinder temperature
sensor (T
133 Temperature sensor type PTC
1000 used as collector
temperature sensor (T
124 Temperature sensors (T
reversed.
125 Collector temperature sensor (T
fitted on collector array inlet.
145 Maximum temperature for solar
cylinder too low.
Delivery rate of disinfection pump
(PE) too low.
Thermal disinfection cancelled
manually before the required
temperature was reached in the
solar cylinder.
146 Solar system is not yet in
operation.
147 Pump (SP) in manual mode.
).
2
)
1
).
2
).
1
and T )
1 2
)
1
TROUBLESHOOTING - FR110
Remedy
Unscrew and remove the slotted
screw on the pump head and
use a screwdriver to release the
pump shaft. Do NOT strike the
pump shaft with the
screwdriver.
Bleed solar system and top up
with heat transfer fluid if
necessary.
Use correct type of temperature
sensor. Technical data in ISM
installation instructions.
Check the temperature sensors
and swap the connections if
necessary.
Fit collector temperature sensor
(T ) close to collector array
1
outlet.
Set higher maximum
temperature for solar cylinder.
Limiting cylinder
temperature.
Set higher pump speed on
disinfection pump (PE) or, if
possible, open flow restrictor
more.
This is not a fault. Message is
shown only for 5 minutes.
Fill, bleed and prepare the solar
thermal system for
commissioning according to its
documentation. Then start up
the solar system.
Reset parameters for pump or
valve to "Auto".
65