DriSteem Vapor-logic 4 User Manual

1BHFt%3*45&&.7BQPSMPHJD*OTUBMMBUJPOBOE0QFSBUJPO.BOVBM
5SPVCMFTIPPUJOHHVJEF
Table 85-1:
Troubleshooting guide (continued)
Transmitter or humidistat issues
Issue Possible causes Actions
Alarm:
RH signal out of range
When transmitter or humidistat alarms appear,
possible causes are:
t 0QFOTIPSUFEPSJODPSSFDUXJSJOH
t *ODPSSFDUTJHOBM
t (SPVOEMPPQ
t 4JHOBMFYDFFETSBOHFMJNJUT$PSSFDUJOQVU
signals are: 4-20 mA, or 0-10 VDC
t $IFDLWPMUBHFTBUCPBSEUFSNJOBMT
At terminal P11
-- RH signal: 2-10 VDC.
-- Dew point signal: 2-10 VDC.
-- Demand signal: 0-10 VDC.
At terminal P13
-- Duct high limit signal: 0-24 VDC, 2-10 VDC.
At terminal P14
-- Auxiliary temp sensor or temperature
compensation sensor: 2-10 VDC.
t $IFDLPVUQVUPOUSBOTNJUUFS
-- If there is no output, replace transmitter.
-- Verify output is 4-20 mA.
-- Calibrate transmitter or humidistat
if necessary.
t *TPMBUJPODPOUSPMCPBSECZPUIFSTNBZOPUCFDPNQBUJCMF$POTVMU
DRI-STEEM.
Alarm:
Dew point signal out of range
Alarm:
Demand signal out of range
Alarm:
Duct RH signal out of range
Alarm:
Aux temp sens out of range
Alarm:
No SDU airflow
t 4%6CMPXFSPSBJSGMPXQSPWJOHTXJUDIJT
incorrectly wired
t $IFDL4%6GPSQSPQFSXJSJOH
t 4%6CMPXFSDPWFSJTPGG
t *OTUBMMDPWFS
t 4%6CMPXFSNPUPSJTJOPQFSBCMF4%6GBOEPFT
not start)
t 3FQMBDF4%6CMPXFS
t#SFBLFSUSJQQFE
t3FTFUCSFBLFS
Continued
Operation

DriSteem Vapor-logic 4 Specifications

General

Brand	DriSteem
Model	Vapor-logic 4
Category	Controller
Language	English