1001

General Notes - For use on the 1001 fitted with VMF7 Printed Circuit Board

*The central heating pump (32) will run to disperse heat if the temperature at the heat exchanger limit thermostat (50) is too high *The frost thermostat (51) will switch on the boiler for central heating if the temperature is too low.

*Fuse on P.C.B.: 2 Amp.

Jumpers JP1 - JP4

 

 

Fitted

 

Not fitted

 

 

 

 

 

JP1

 

No waiting time

 

Waiting time on

 

 

 

 

 

JP4

 

Fan control

 

Fan control

 

 

High & Low speed

 

High speed only/off

 

 

 

 

 

Temp.

temp.

Ohm

 

 

10° C

890 ohm

sensor

25° C

1000 ohm

 

60° C

1300 ohm

 

80°C

1490 ohm

LED n°

signification:

 

 

1

Mains on/low voltage on

 

 

2

Flowmeter (136) on

 

 

3

Central heating room thermostat (72) / clock (62) calling

4

Sensor (34) or (42) calling for heat

 

 

5

Central Heating waiting time, max. 3 minutes delay following shut off

 

 

 

Boilerstat (63), Clock (62), Roomstat (72) or use of Hot Water

 

 

6

Demand for heat - relay (RY2) will be energised

 

 

7

Air pressure switch (43) on, air flow checked

RY not energised

RELAY RY

RY1

central heating pump

RY2

on/off relay

RY3

-

RY4

fan

 

 

RY energised

Note

If RY1 is not energised the Central Heating pump will run

Check operation using LED's as a fault finding guide. First check section A, then B, then C, then D.

0 = LED off

1 = LED on

 

x = LED either on/off is not important

 

 

 

 

 

 

 

 

Domestic Hot water tap open

 

(Flow rate greater than 2,5 l/min)

 

LED

OK

 

 

FAULT

 

POSSIBLE CAUSE OF FAULT

 

1

1

 

 

 

0

 

No mains electricity/switches off/fuse blown.

 

2

1

 

 

 

0

 

D.H.W. flowmeter (136) not operating.

A

3

X

 

 

X

 

Not required for D.H.W.

4

1

 

 

 

0

 

- D.H.W. sensor (42) not connected or D.H.W. temperature too high

 

5

0

 

 

 

1

 

- Waiting time operating: replace P.C.B.

 

6

1

 

 

 

0

 

Short circuit on D.H.W. sensor (42) or resistance lower than 500 Ohm

 

 

 

 

 

 

 

 

- C.H. limit thermostat (50) open circuit (pump run)

 

 

 

 

 

 

 

 

- C.H. water pressure low (114 open circuit)

 

 

 

 

 

 

 

CENTRAL HEATING ON

 

 

Room stat (72) at Max, HW tap closed

 

LED

OK

 

 

FAULT

 

POSSIBLE CAUSE OF FAULT

 

1

1

 

 

 

0

 

No main electricity/switches off, fuse blown.

 

2

0

 

 

 

1

 

Hot water tap open - D.H.W. flowmeter (136) contact closed

 

3

1

 

 

 

0

 

Roomstat (72) or clock (62) not calling for heat

B

4

1

 

 

 

0

 

- Central heating sensor (34) not connected or

 

 

 

 

 

 

 

- boiler temperature too high or

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- boiler thermostat (61) below CH temperature

 

5

0

 

 

 

1

 

Waiting time still operating (max. 3 minutes)

 

6

1

 

 

 

0

 

- C.H. sensor (34) short circuit or resistance lower than 500 ohm

 

 

 

 

 

 

 

 

- C.H. limit thermostat (50) open circuit (pump will run)

 

 

 

 

 

 

 

 

- C.H. water pressure low (114 open circuit)

 

 

 

 

GENERAL TEST FOR D.H.W. AND CENTRAL HEATING (First check A and B above)

 

LED/REL.

OK

 

 

FAULT

 

POSSIBLE CAUSE OF FAULT

 

RY2

energised

 

not energised

 

Check first A and B above

C

RY4

energised

 

not energised

 

Air pressure switch (43) not in NC position or miswired:

 

 

 

 

 

 

 

- check wiring

 

 

 

 

 

 

 

 

 

- fan (16) at low speed remove jumper JP4

 

 

 

 

 

 

 

 

 

7

1

 

 

 

0

 

- fan (16) not running at full speed or

 

 

 

 

 

 

 

 

- air flow too low:

 

 

 

 

 

 

 

 

 

- air pressure switch (43) faulty

 

 

 

 

 

 

 

 

 

 

 

D

IGNITION OF BURNER

(AUTOMATIC IGNITION)

 

1 Fan (16) should run at full speed (open hot tap or set controls

3

Check spark and position of spark electrode (81)

 

so boiler is calling for heat).

 

 

 

4 Check position of flame sensing electrode (82)

 

2 Check first A, B and C above (LED 6 is ON?)

5

Check burner gas pressure during ignition

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30

Page 29 Page 31
Page 30
Image 30
Optima Company 1001 installation instructions Jumpers JP1 JP4, Temp Ohm, Sensor, RY not energised, RY energised
Page 29 Page 31

1001 specifications

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