ROBERTS GORDON
®
CORAYVAC
®
M
ODULATING
H
EATING
C
ONTROL
C
ONTROLLER
I
NSTALLATION
M
ANUAL
66
SECTION 9: TROUBLESHOOTING
As a convenience, the following troubleshooting sec-
tion was created as a basic guide to assist with
equipment or installation issues. Protective gear is to
be worn during troubleshooting in accordance with
the Occupational Safety and Hazard Administration
(OSHA). Gear must be in accordance to NFPA 70E,
latest revision, when working with electrical compo-
nents. Thin sheet metal parts have sharp edges. To
prevent injury, the use of work gloves is recom-
mended. Troubleshooting must be performed by a
contractor qualified in the installation and service of
equipment sold and supplied by Roberts-Gordon
LLC and conform to all requirements set forth in the
ROBERTS GORDON
®
manuals and all applicable
governmental authorities pertaining to the installa-
tion, service, operation and labeling of the equip-
ment.
If problems persist after following troubleshooting
guide, contact your local ROBERTS GORDON®
independent distributor, or Roberts-Gordon LLC
Inside Sales at 716-852-4400.
Table of Contents:
- Vacuum pump does not turn on
- VFD Turns on, but the desired
zone does not turn on
- VFD showing a fault sign
- VFD input power issue
- Vacuum pump power issue
- Burner troubleshooting in man-
ual mode
– After 45 second prepurge,
burners do not light
- Burner intermittent lockout
- APS doesn’t close within 60
seconds after VFD receives run command
- Zone sensor issue
- Air Pressure Switch alarm
- Modbus troubleshooting
- Repeater troubleshooting
- BACnet MS/TP troubleshooting
- Touch pad troubleshooting
DANGER
Electrical Shock Hazard
Disconnect electric before service.
More than one disconnect switch may be
required to disconnect electric to the unit.
Failure to follow these instructions can result
in death or electrical shock.
WARNING
Explosion Hazard
Turn off gas supply to heater before service.
Failure to follow these instructions can result
in death, injury or property damage.
Summary of Contents for CORAYVAC
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Page 69: ...SECTION 8 PROGRAMMING AND TROUBLESHOOTING THE SYSTEM 65 THIS PAGE LEFT INTENTIONALLY BLANK ...
Page 71: ...SECTION 9 TROUBLESHOOTING 67 FIGURE 26 Vacuum pump does not turn on ...
Page 75: ...SECTION 9 TROUBLESHOOTING 71 FIGURE 31 Burner troubleshooting in manual mode ...
Page 77: ...SECTION 9 TROUBLESHOOTING 73 After 45 second prepurge burners do not light continued ...
Page 81: ...SECTION 9 TROUBLESHOOTING 77 FIGURE 36 Air Pressure Switch alarm ...
Page 83: ...SECTION 9 TROUBLESHOOTING 79 FIGURE 38 Repeater troubleshooting ...
Page 85: ...SECTION 9 TROUBLESHOOTING 81 BACnet MS TP troubleshooting continued ...
Page 109: ...SECTION 13 TOUCHSCREEN TREE 105 Touchscreen Tree Overview continued ...
Page 111: ...SECTION 13 TOUCHSCREEN TREE 107 FIGURE 47 Maintenance Unit FIGURE 48 Alarms ...
Page 113: ...SECTION 13 TOUCHSCREEN TREE 109 FIGURE 51 Configuration Zones FIGURE 52 Configuration Unit ...
Page 115: ...SECTION 13 TOUCHSCREEN TREE 111 FIGURE 55 Touchscreen System FIGURE 56 Touchscreen Setup ...
Page 118: ...ROBERTS GORDON CORAYVAC MODULATING HEATING CONTROL CONTROLLER INSTALLATION MANUAL 114 ...