Refrigeration System Diagnosis
14-4
TCI AND SPECTRUM MODELS
Zone
heat
ing past septoint
Zone Cooling
past setp
oint
Unit cools in
Heat and
Defrost cycle
Unit heats i
n
Refri
g
erati
on cy
cle
High head
pressure
Low head p
ressure
No head
pressure
High suction
pressu
re
Low suction
pressure
No su
ction
p
ressure
Unit operati
ng in vacuum
Receiver
sigh
t glass empty
Su
ction line frosting b
a
ck
Unabl
e
to pump do
wn sys
tem
U
n
a
b
le
to
pul
l
va
cuum
i
n
lo
w
si
de
U
n
a
b
le
to
ho
ld
va
cuu
m
i
n
lo
w
si
de
Noisy compressor
Unit not refrigerating
Unit not heating o
r
defros
ting
SYMPTO
M
POSSIBLE CAUSE
•
• • Faulty Condenser Inlet Solenoid (CIS)
• •
•
•
• • Faulty hot gas solenoid (HGS)
•
• • Leaky check valve
• •
• • Faulty check valve
•
Leaky receiver tank pressure solenoid (RTPS)
•
• Closed receiver tank pressure solenoid (RTPS)
•
•
•
•
•
Leaky front hot gas solenoid (HGS)
•
• Closed front hot gas solenoid (HGS)
•
Leaky front liquid line solenoid (LLS)
• • •
•
Closed front liquid line solenoid (LLS)
• Leaky suction line check valve (SLCV)
•
•
•
Leaky rear hot gas solenoid (RHGS or HGS3)
•
• Closed rear hot gas solenoid (RHGS or HGS3)
•
Leaky rear liquid line solenoid (RLLS or LLS3)
• • •
•
Closed rear liquid line solenoid (RLLS or LLS3)
•
•
•
Leaky rear liquid return check valve (RLRCV or LRCV3)
• Leaky front liquid return check valve (FLRCV or LRCV3)
•
•
Leaky rear suction line solenoid (RSLS or SLS3)
•
•
Leaky front suction line solenoid (FSLS or SLS3)
•
• •
•
Leaky purge valve (PV)
• Leaky rear suction line check valve (RSLCV or SLCV3)
• Leaky front suction line check valve (FSLCV or SLCV3)
•
•
•
Leaky center hot gas solenoid (CHGS or HGS2)
•
• Closed center hot gas solenoid (CHGS or HGS2)
•
Leaky center liquid line solenoid (CLLS or LLS2)
•
•
Closed center liquid line solenoid (CLLS or LLS2)
•
Leaky center liquid return check valve (CLRCV or LRCV2)
•
•
Leaky center suction line solenoid (CSLS or SLS2)
• Leaky center suction line check valve (CSLCV or SLCV2)
Summary of Contents for SLXi Spectrum
Page 17: ...Safety Precautions 2 5 Warning Decals...
Page 18: ...Safety Precautions 2 6 Warning Decals Information Decals...
Page 74: ...Unit Description 5 30...
Page 128: ...Controller Operation 7 28...
Page 156: ...Electrical Maintenance 8 28...
Page 234: ...Refrigeration Maintenance 10 22...
Page 309: ...13 Mechanical Diagnosis TK 482 TK 486 and TK 486V Engines 13 2...
Page 316: ...Mechanical Diagnosis 13 8...
Page 322: ...Refrigeration System Diagnosis 14 6...
Page 332: ...Single Temperature Refrigeration System Diagrams 15 10...
Page 339: ...Multi Temperature Refrigeration System Diagrams 16 7...
Page 340: ...Multi Temperature Refrigeration System Diagrams 16 8...
