64
SERVICE J6-10 On = dirty air filter indication
Off = normal operation
Pulsing = a diagnostic is present
(see DIAGNOSTICS).
Note: Diagnostics for CV or VAV units are listed
separately. The same diagnostic may have a
different meaning depending on whether the unit has
VAV controls or CV controls.
Diagnostics (CV units only)
If only one diagnostic is present, refer to that diagnostic list-
ing below. If more than one diagnostic is present, refer to
combination diagnostics such as COOL + HEAT as appro-
priate. On a BAYSENS019*, the display will show HEAT
FAIL or COOL FAIL or SERVICE (or an appropriate combi-
nation) if a diagnostic is present. If the unit is using a con-
ventional thermostat, diagnostics are still available by using
a DC voltmeter as described above.
HEAT
(YC only)
1. TCO1, TCO2 or TCO3 has opened
2. IGN Module lockout (see gas heat section for trouble-
shooting)
COOL
1. Zone temp input (RTRM J6-1) is open, shorted, or has
failed after the RTRM sensed a valid input. (see note)
Note: Since CV units may use a conventional
thermostat, the RTRM will not send a diagnostic if a
zone sensor is not attached when power is applied to
the unit. Also, the RTRM ignores a zone sensor if it
is attached to a powered-up unit. (after a brief time-
out). Therefore, always reset power after installing a
mechanical ZSM to terminals RTRM J6-1 through
J6-5.
2. Cooling and heating setpoint inputs are both open,
shorted, or failed, but the unit has a valid zone temp in-
put.
3. Programmable ZSM (BAYSENS019B) has failed to com-
municate after successful communication has occurred.
4. CC1 or CC2 24 VAC control circuit has opened 3 times
during a cooling mode. Check CC1, CC2 coils or any
controls in series with the coils (winding thermostat,
HPC, circuit breaker auxiliary contacts).
5. LPC 1 or LPC 2 has opened during the 3 minute mini-
mum "on" time during 4 consecutive compressor starts.
Check LPC 1 circuit by measuring voltage from RTRM
J1-8 to chassis ground. Check LPC 2 circuit by measur-
ing voltage from RTRM J3-2 to chassis ground. If 24 VAC
is not present, the circuit is open. 24 VAC should present
at these terminals at all times.
SERVICE
1. The supply fan proving switch (FFS) has failed to close
within 40 seconds after the fan starts or has closed dur-
ing fan operation.
HEAT + COOL
1. The Emergency Stop input (LTB1-5 and LTB1-6) is open.
Check this input at the RTRM by measuring voltage from
RTRM J1-12 to chassis ground. 24 VAC should be
present whenever the Emergency Stop input is closed.
2. Outdoor air sensor (OAS) input is open, shorted, or has
failed.
Diagnostics (VAV only)
If only one diagnostic is present, refer to that diagnostic. If
more than one diagnostic is present, refer to combination
diagnostics such as COOL + HEAT as appropriate. On a
BAYSENS020*, the display will show HEAT FAIL or COOL
FAIL or SERVICE (or an appropriate combination) if a diag-
nostic is present.
HEAT (YC only)
1. TCO1, TCO2, or TCO3 has opened
2. IGN Module lockout (see gas heat section for trouble-
shooting)
COOL
1. Discharge air sensor (DTS) is open, shorted, or has
failed.
2. Zone temp input (RTRM J6-1) is open, shorted, or failed
during an unoccupied mode. If the unit has a default
mode input (jumper from RTRM J6-2 to RTRM J6-4, a
valid zone temp input is needed for unoccupied heating,
MWU and DWU.
3. CC1 or CC2 24 VAC control circuit has opened 3 times
during a cooling mode. Check CC1, CC2 coils or any
controls in series with the coils (winding thermostat,
HPC, circuit breaker auxiliary contacts).
4. LPC 1 or LPC 2 has opened during the 3 minute mini-
mum "on" time during 4 consecutive compressor starts.
Check LPC 1 circuit by measuring voltage from RTRM
J1-8 to chassis ground. Check LPC 2 circuit by measur-
ing voltage from RTRM J3-2 to chassis ground. If 24 VAC
is not present, the circuit is open. 24 VAC should present
at these terminals at all times.
SERVICE
1. The supply fan proving switch (FFS) has failed to open
within 40 seconds after the fan starts or has closed dur-
ing fan operation.
COOL + SERVICE
1. Static Pressure Transducer output voltage at RTAM J1-3
is less than 0.25VDC. The transducer output is open,
shorted, or the transducer is reading a negative supply
air pressure.
HEAT + COOL
1. The Emergency Stop input (TB1-5 and TB1-6) is open.
Check this input at the RTRM by measuring voltage from
RTRM J1-12 to chassis ground. 24 VAC should be
present whenever the Emergency Stop input is closed.
2. Outdoor air sensor (OAS) input is open, shorted, or has
failed.
HEAT + COOL + SERVICE
1. Static Pressure High Duct Static Trip. The static pressure
has exceeded 3.5" W.C. three consecutive times.
Resetting Cooling and Ignition Lockouts
Cooling Failures and Ignition Lockouts are reset in an iden-
tical manner. Method 1 explains resetting the system from
the space; Method 2 explains resetting the system at the
unit.
Note:
Before resetting Cooling Failures and Ignition
Lockouts check the Failure Status Diagnostics by
the methods previously explained. Diagnostics will
be lost when the power to the unit is disconnected.
Содержание Voyager RT-SVX17C-EN
Страница 8: ...8 Figure 1 Unit Dimensions for TC_ TE_ and YC_330 360 and 420 MBH Units Low Heat ...
Страница 9: ...9 Figure 1 continued Unit Dimensions for YC_330 360 and 420 MBH Units High Heat ...
Страница 10: ...10 Figure 1 continued Unit Dimensions for TC_ TE_ and YC_480 and 600 MBH Units Low High Heat ...
Страница 24: ...24 Figure 10 Typical FieldWiring Requirements for CV Control Options ...
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