Section 9: Troubleshooting - Roberts Gorden CORAYVAC Installation Manual

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ROBERTS GORDON CORAYVAC

SECTION 9: 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.
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 ®
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.
66
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M H C C
ODULATING EATING ONTROL
manuals and all applicable
I M
ONTROLLER NSTALLATION ANUAL
Table of Contents:
Page 67 , Figure 26 - Vacuum pump does not turn on
Page 68, Figure 27 - VFD Turns on, but the desired
zone does not turn on
Page 69, Figure 28 - VFD showing a fault sign
Page 69, Figure 29 - VFD input power issue
Page 70, Figure 30 - Vacuum pump power issue
Page 71, Figure 31 - Burner troubleshooting in man-
ual mode
Page 72, Figure 32 – After 45 second prepurge,
burners do not light
Page 74, Figure 33 - Burner intermittent lockout
Page 75, Figure 34 - APS doesn't close within 60
seconds after VFD receives run command
Page 76, Figure 35 - Zone sensor issue
Page 77 , Figure 36 - Air Pressure Switch alarm
Page 78, Figure 37 - Modbus troubleshooting
Page 79, Figure 38 - Repeater troubleshooting
Page 80, Figure 39 - BACnet MS/TP troubleshooting
Page 82, Figure 40 - Touch pad troubleshooting