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TT-S
ERIES
I
NSTALLATION
, O
PERATION
AND
S
ERVICE
M
ANUAL
184 of 198
Observed Problem
Possible Cause
Remedy
H
1
H
u
nting
1
Increase
b
and
w
ith setting. See Opera-
tion Men
u
programming in MP2(+)
User's Programming G
u
ide. If flame
sta
b
ilizes, red
u
ce
b
and
w
ith to the mini-
m
u
m setting
w
here a sta
b
le flame can
b
e maintained.
2
Erratic air patterns or improper
TS194(Q) location.
2
Connect test resistor as descri
b
ed in
step 2 of Preliminary Circ
u
it Analysis.
Set point temperat
u
re to process tem-
perat
u
re
b
eing displayed. If the flame is
steady, the TS194(Q) sho
u
ld
b
e
remo
v
ed.
3
Wiring is r
u
n next to high
v
oltage
s
w
itching circ
u
its ca
u
sing
ind
u
ced
v
oltages.
3
Temporarily
w
ire MP2, TS194(Q) and
mod
u
lating gas
v
al
v
e externally and
o
b
ser
v
e heater/eq
u
ipment operation. If
smooth operating res
u
lts, isolate
effected
w
iring from so
u
rce of ind
u
ced
v
oltage.
4
Fa
u
lty amplifier or erratic
v
oltage
s
u
pply.
4
With DC
v
oltmeter connected (per item
2 a
b
o
v
e) and locally connected (per
item 3 a
b
o
v
e), o
b
ser
v
e DC
v
oltage
across mod
u
lator terminals. If erratic or
u
nsta
b
le DC
v
oltages are o
b
tained, the
MP2 may
b
e fa
u
lty. Replace. If erratic
operation contin
u
es after replacement,
cons
u
lt Maxitrol Company.
I
Incorrect discharge air
temperat
u
re
1
Incorrect
w
iring
1
Check
w
iring diagrams in MP2(+)
Installation G
u
ide and correct if neces-
sary.
2
System o
u
t of cali
b
ration
2
If sensed temperat
u
re (thermometer
next to TS194(Q)) does not correspond
to MP2 setting. See Cali
b
ration Proce-
d
u
re in MP2(+) User's/Programming
G
u
ide.
3
Improper TS194(Q) location
3
Is sensed temperat
u
re does not repre-
sent a
v
erage discharge at temperat
u
re,
mo
v
e TS194(Q) to location
w
here a
v
er-
age representati
v
e temperat
u
re can
b
e
sensed.
J
B
u
rned o
u
t transformer
1
Short circ
u
it in mod
u
lator coil
1
Meas
u
re resistance across the mod
u
-
lator terminals
w
ith connecting
w
ires
detached. Replace mod
u
lator head if
less than 40 ohms.
2
Short circ
u
it
b
et
w
een amplifier
and mod
u
lator
v
al
v
e.
2
Inspect
w
iring. Correct
w
iring if short is
fo
u
nd
u
sing the
w
iring diagrams in
MP2(+) Installation G
u
ide.
K
Process temperat
u
re
display reads "Lo
w
"
1
Discharge air temperat
u
re too
lo
w
.
1
Raise discharge air temperat
u
re to
greater that 60 °F.
Содержание TT Series
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Страница 4: ......
Страница 136: ...TT SERIES INSTALLATION OPERATION AND SERVICE MANUAL 130 of 198 FIGURE 114 Regulator RV61 ...
Страница 167: ...SECTION27 TROUBLESHOOTING 161 of 198 ...
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Страница 176: ...TT SERIES INSTALLATION OPERATION AND SERVICE MANUAL 170 of 198 27 7 2 Series 94 Field Service Checklist ...
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Страница 202: ...TT SERIES INSTALLATION OPERATION AND SERVICE MANUAL 196 of 198 ...
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Страница 204: ...TT SERIES INSTALLATION OPERATION AND SERVICE MANUAL 198 of 198 ...