EB0030
3. Troubleshooting
Heat Recovery System – Fosters/Scutts
Scutt's Condender Units
To reclaim heat from the fridge and freezer condenser units.
The control panel provides a permanent 230V supply to the condenser.
When the compressor runs, it is wired to pull in a relay. This will cause
the motorised zone valve to open. When fully open the microswitch
within the motorised valve will close providing a switched live back to the
control panel. This switched live will operate the pump station PS1.
Part Name:
M
anufacturer's Part Details:
Function:
Specifics:
Testing:
1. With the power on and CB4 on, measure the voltage for the permanent live supply to the heat recovery
system between control panel terminal 3L1 and Earth. The correct reading is 230V. If 0V, test CB4.
2. With the power on and CB4 on, and both Fosters condenser units isolated (off on both isolators), measure the
voltage for the switched live between terminal 9 and Earth. The correct reading is 0V. If 230V is present, check
the state of the motorised valve: If indicator is perpendicular with the pipe then replace the motorised valve. If the
indicator is in line with the pipe then further checks are necessary to see if the valve orientation is wrong (valve
moves opposite to the way it should), or if the valve is faulty (will not move).
3. With the power on, CB4 on, and one Fosters unit powered on and running, measure the voltage between
terminal 9 and Earth. The correct reading is 230V. If 0V, test relay and motorised valve in condenser unit.
4. With the power off, test continuity between terminals 6 and 7. The correct reading is closed circuit. If open
circuit, check dual stat over heat has not tripped, and tank temperature is below set point. Replace Dual Stat if
faulty.
5. With the power on, CB4 on, the fridge or freezer on, and 230V at terminal 9, measure the voltage between
terminal 8 and Earth. The correct reading is 230V. If 0V, further tests on the Dual Stat are necessary.
6. With Voltage at terminal 8 the pump station should run. If not, test the pump, also ensure system has fluid in it.
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P R A C T I C A L , E F F I C I E N T & S U S T A I N A B L E B U I L D I N G S E R V I C E S S O L U T I O N S
EB002
5-EB0028-EB0030 Control Panel
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Installation and maintenance manual
