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WSHP-SVX015C-EN
LED 4 (Service)
“On” indicates a clogged filter.
“Off” during normal operation.
“Flashing” indicates an evaporator fan failure or
Condensate Overflow Switch (COF) failure.
Failure indication causes
System Failure
Check the voltage between terminals 6 and 9 on J6, it
should read approximately 32 Vdc. If no voltage is
present, a System failure has occurred. Refer to Step 4
in the previous section for the recommended
troubleshooting procedure.
Cooling Failure
1. Cooling and heating set point (slide pot) on the
zone sensor has failed. Refer to the “Zone Sensor
Test Procedure” section.
2. Zone temperature thermistor ZTEMP on ZTS failed.
Refer to the “Zone Sensor Test Procedure” section.
3. CC1 or CC2 24 Vac control circuit has opened, check
CC1 & CC2 coils, and any of the controls below that
apply to the unit (HPC1, HPC2).
4. LPC1 has opened during the 3 minute minimum
“on time” during 4 consecutive compressor starts,
check LPC1 or LPC2 by testing voltage between the
J1-8 & J3-2 terminals on the RTRM and ground. If
24 VAC is present, the LPC’s has not tripped. If no
voltage is present, LPC’s has tripped.
Service Failure
1. If the supply fan proving switch has closed, the unit
will not operate (when connected to RTOM), check
the fan motor, belts, and proving switch.
2. Clogged filter switch has closed, check the filters.
Simultaneous Heat and Cool Failure
1. Emergency Stop is activated.
Method 2
The second method for determining system status is
done by checking voltage readings at the RTRM (J6).
The system indication descriptions and the
approximate voltages are listed below.
System Failure
Measure the voltage between terminals J6-9 & J6-6.
Normal Operation = approximately 32 Vdc
System Failure = less than 1 Vdc, approximately 0.75
Vdc
Test Mode = voltage alternates between 32 Vdc & 0.75
Vdc
Heat Failure
Measure the voltage between terminals J6-7 & J6-6.
Heat Operating = approximately 32 Vdc
Heat Off = less than 1 VDC, approximately 0.75 Vdc
Heating Failure = voltage alternates between 32 Vdc &
0.75 Vdc
Cool Failure
Measure the voltage between terminals J6-8 & J6-6.
Cool Operating = approximately 32 Vdc
Cool Off = less than 1 Vdc, approximately 0.75 Vdc
Cooling Failure = voltage alternates between 32 Vdc &
0.75 Vdc
Service Failure
Measure the voltage between terminals J6-10 & J6-6.
Clogged Filter = Approximately 32 Vdc.
Normal = Less than 1 Vdc, approximately 0.75 Vdc
Fan Failure = voltage alternates between 32 Vdc & 0.75
Vdc.
N
No
otte
e:: If the Condensate Overflow Switch is closed, the
unit will not operate. Check to make sure the
float position is not in a tripped condition and
verify an "open" between wires connecting to
RTOM J6-1, J6-2.
To use LED’s for quick status information at the unit,
purchase a BAYSENS110* ZSM and connect wires with
alligator clamps to terminals 6 through 10. Connect
each respective terminal wire (6 through 10) from the
Zone Sensor to the unit J6 terminals 6 through 10.
N
No
otte
e:: If the system is equipped with a programmable
zone sensor, (BAYSENS119*), the LED indicators
will not function while the BAYSENS110* is
connected.
Resetting Cooling and Heating
Lockouts
Cooling Failures and Heating Lockouts are reset in an
identical manner. Method 1 explains resetting the
system from the space; Method 2 explains resetting the
system at the unit.
N
No
otte
e:: Before resetting Cooling Failures and Heating
Lockouts check the Failure Status Diagnostics by
the methods previously explained. Diagnostics
will be lost when the power to the unit is
disconnected.
Method 1
To reset the system from the space, turn the “Mode”
selection switch at the zone sensor to the “Off”
position. After approximately 30 seconds, turn the
“Mode” selection switch to the desired mode, i.e. Heat,
Cool or Auto.
Содержание Axiom GWS Series
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