Worcester CDi Combi N.G Service Booklet page 60

TROUBLESHOOTING - FW 100
Information displayed (
and 4 in fig.16)
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. 30
60
Supplied By www.heating spares.co Tel. 0161 620 6677
Pos. 1, 3
Code Cause
121 Solar pump (SP) sticking due to
126 physical blockage.
140
Air in solar thermal system.
122 Collector temperature sensor type
used as cylinder temperature
sensor (T ).
2
123 Cylinder temperature sensor type
used as collector temperature
sensor (T )
1
127 Cylinder temperature sensor type
used as collector temperature
sensor (TA).
132 Temperature sensor type PTC 1000
used as cylinder temperature
sensor (T ).
2
133 Temperature sensor type PTC 1000
used as collector temperature
sensor (T ).
1
124 Temperature sensors (T
reversed.
125 Collector temperature sensor (T
128 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.
154 Pump (PE) operated manually.
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.
and T ) Check the temperature sensors and
1 2
swap the connections if necessary.
) Fit collector temperature sensor (T
1
close to collector array outlet.
Set maximum temperature for the solar
cylinder higher
temperature, page 49.
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".
8 716 115 748 (2009/09)
)
1
limit cylinder