Operating Instruction
Healthcare chiller of the KSC Series
Version „Revision 09“
Type KSC 215-L-U/S
page 27von138
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KIND OF TROUBLE
CAUSE
ELIMINATION
•
malfunction of
refrigerating
machine
1.
simatic stopped machine, return
temperature too cold
-
to check function, level down
adjustments, wait until return
temperature rised
•
still malfunction of
refrigerating
machine
1.
low pressure in refrigerant circuit
-
plant looses refrigerant
-
dryer in liquid pipe dirty
-
pressure relief valve defective
-
expansion valve 9Y1 and 16Y3
2.
high pressure in refrigerant circuit
-
condenser dirty
-
fan defective
-
outside temperature too high
-
pressure sensor 20B1 and 23B1 for
condenser control defective
-
Frequency inverter defective
-
find leak, seal, refill circuit
-
replace dryer
-
replace pressure relief valve
-
replace expansion valve
-
clean condenser
-
put right electric cause;
check fuses 20Q1 and 23Q1
-
spray condenser with water
-
replace pressostate
-
replace frequency inverter 20U1
and 23U1
•
refrigerating
machine starts and
stops short-termed
1.
not enough fresh air supply for
condenser;
high pressure pressostate tries to
protect refrigerating machine against
overload
2.
not enough pressure of refrigerant
circuit;
refrigerant partly escaped; diminished
pressure switch shut down compressor
-
provide enough fresh air supply and
fresh air removal;
get rid of short-circuit across fresh air
and exhaust air
-
find leak, seal, refill circuit
•
not enough
refrigeration power
1.
air in water circuit
2.
fallen below minimum water agitation
quantity
3.
not enough fresh air supply for
condenser
4.
not enough refrigerant in circuit
-
vent system
-
design cross-section of water pipe
right;
perhaps open check valve in water
circuit completely, increase pipe cross-
section
-
provide enough fresh air supply and
fresh air removal;
get rid of short-circuit across fresh air
and exhaust air
-
find leak, seal, refill circuit
