Viessmann Vitotronic SPS Service Instructions Manual page 51

Overview of fault messages
TID Pp. No. Fault message
49 "Oil pressure comp. 2"
50 "Oil pressure comp. 3"
52 "Safety chain compressor
1"
53 "Safety chain compressor
2"
54 "Safety chain compressor
3"
64 "Oil temp. too low C1 comp
1"
65 "Oil temp. too low C2 comp
2"
(cont.)
Effect
Compressor 2 is switched off
Compressor 3 is switched off
Compressor 1 is switched off
Compressor 2 is switched off
Compressor 3 is switched off
Compressor 1 does not
switch on or off
Compressor 2 is switched off
Troubleshooting
Cause
Too little pressure differential
across the compressor oil
pump (no oil delivered)
Compressor has too little or
■
no oil.
Oil pump faulty
■
Oil is mixed with liquid re-
■
frigerant.
Too little pressure differential
across the compressor oil
pump (no oil delivered)
Compressor has too little or
■
no oil.
Oil pump faulty
■
Oil is mixed with liquid re-
■
frigerant.
Compressor 1 safety chain
has responded.
Possible consequential fault in
winding protection and high
pressure
Soft starter alarm contact has
responded.
Check soft starter alarm LED.
Compressor 1 safety chain
has responded.
Possible consequential fault in
winding protection and high
pressure
Soft starter alarm contact has
responded.
Check soft starter alarm LED.
Compressor 1 safety chain
has responded.
Possible consequential fault in
winding protection and high
pressure
Soft starter alarm contact has
responded.
Check soft starter alarm LED.
Oil temperature in compressor
too low
Ambient temperature too
■
low
Compressor oil sump heater
■
faulty
Oil temperature in compressor
too low
Ambient temperature too
■
low
Compressor oil sump heater
■
faulty
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