Fridgewatch 2100 Controller Mk4
Publication 3-58
Section 3
Page 128 of 152
Issue 1.1 : 01/08
(l)
Change over jumper 1-B-2 from the B-2 position to the 1-B position
to connect the power supply from the battery to the card.
(m)
Check jumpers 1-W-2 and 1-P-2 are in their normal positions as
shown in Fig 20.
(n)
Turn the Fridgewatch 2100 Controller main isolator to the ‘on’
position.
(o)
Enter Operator and Configuration Settings as described under 8..
(p)
Use Configuration Settings S56, S57 and S58 to reset the number
of hours each compressor has run.
12.7.
Checking and Replacement of Lithium Back-up Battery
The lithium back-up battery is mounted on the RAMP4 Processor Card;
refer to Fig 20.
The battery provides the power required to maintain RAM memory of
Fridgewatch 2100 setting data when Fridgewatch is switched off or in the
event of a mains power supply failure. A healthy, fully charged battery
should retain memory in the processor for at least 6 months.
After 5 years operation, however, the battery will be nearing the end of its
useful life and may begin to fade. Check the battery output voltage
against the values in Table 1. If the voltage is within the limit, check the
battery voltage every year until it needs replacing.
Fit a new battery as follows.
(a)
Carry out steps (a) to (e) in 12.6. Fitting a New RAMP4 Processor
Card.
(b)
The battery is located under a spring-loaded clip. Disengage the
clip to remove the old battery and fit the new one.
WARNING
Make sure the new battery is fitted the correct way
round, positive (+) pole uppermost, or the RAMP4 card
may be damaged.
If possible, return the old battery to the manufacturer for
recycling; otherwise, dispose of safely. DO NOT
attempt to open the battery or incinerate it.
(c)
Complete the operation by carrying out steps (l) to (p) in 12.6.
Fitting a New RAMP4 Processor Card.
12.8.
Maintenance Check List
Table 16 illustrates the maintenance items as a ‘Check List’.
E
VERY
5
Y
EARS
E
VERY
Y
EAR
R
EF
M
AINTENANCE
I
TEM
-
Check measured point values against pressure gauges, thermometers and current meter
readings.
Check damage to external wiring.
Check screw terminals, fuseholders etc., for loose connections.
X -
12.1. and (h).
Check transducer calibration
-
X
12.7
Check and if necessary renew the RAMP4 Processor Card back-up battery. After the first
check after 5 years, check the battery voltage every year.
- X
Table 16 Maintenance Check List
