Specifications

Control Valves - SMARTLINK
®
MRV
www.maxoncorp.com
combustion systems for industry
Maxon reserves the right to alter specifications and data without prior notice.
© 2014 Copyright Maxon Corporation. All rights reserved.
10-30.7-66
E - i - 3/14
50120624-001/
Troubleshooting and Alarms/Faults
If the alarm light of the Control Interface is on or flashing, view the alarm (or fault) condition by executing Command A-1, Display
Alarms. After command entry, the INC/DEC switch is used to scroll through the alarm codes. The cause of the alarm can be
determined by observing the numbered lights turned on and matching the light pattern to the table entry below. Corrective action
and the optional User Display text message of each alarm are also provided in the following tables. All fault conditions initiate a
combustion system shutdown (or "lockout") and require a remote reset command or power cycling to restart.
Valve Actuator Alarms / Faults
Alarm / Fault Code
Light #0-3 = Valve #
Light #5-9 =
Alarm/Fault Condition
Alarm / Fault Name
User Display Message
(V# = Valve No. 0, 1, 2,
or 3)
Alarm / Fault Description and Corrective Action
Valve #, 5
Position
Overshoot
“ALARM: V#
OVERSHOOT”
Actuator detected problem with position control.
If alarm persists, replace valve actuator.
Valve #, 6
Position
Breakaway
“ALARM: V#
BREAKAWAY”
Actuator detected problem holding commanded position.
Check valve’s operating differential pressure and compare with specification; if alarm persists
and measured pressure does not exceed valve rating, replace actuator.
Valve #, 5, 6 Sticky Valve “ALARM: V# STICKY
Actuator could not momentarily position to within 0.1 degree.
With the system and valve powered down, check if there is debris or a mating flange inhibiting
valve movement. If the alarm persists and no mechanical problem is found, replace actuator.
Valve #, 7
Stuck Valve
(Fault)
“FAULT: V# STUCK”
Actuator could not position to within 0.1 degree.
With the system and valve powered down, check if there is debris or a mating flange inhibiting
valve movement. If the alarm persists and no mechanical problem is found, replace actuator.
Valve #, 5, 7 Temperature “ALARM: V# TEMP”
Actuator senses out-of-specification ambient temperature.
Check temperature of actuator’s enclosure. If actuator temperature is within specification,
replace actuator. Otherwise, remove (or add) heat source.
Valve #, 6, 7 Calibration
“ALARM: V#
CALIBRATE”
Actuator is not calibrated.
If a User Display is provided, select the alarming valve number and perform calibration. Con-
tact MAXON if a User Display was not purchased.
Valve #, 5, 6, 7 DC Supply Voltage “ALARM: V# 24VDC”
Actuator senses out-of-specification +24VDC supply.
Check for heavily loaded power supply, a failed supply, or cable length out-of-specification.
Valve #, 8 Processor Reset “ALARM: V# RESET”
Actuator detected processor reset due to improper software execution, high electrical noise,
improper shield terminations, or electronics failure. If alarm persists after checking for noise
source, replace actuator.
Valve #, 5, 8 ADC Hardware “ALARM: V# ADC”
Actuator detected an analog-to-digital hardware or position control problem. If alarm occurs
with sticky or stuck valve alarm, see corrective action for sticky/stuck alarm above. If only this
alarm occurs and persists after repowering actuator, replace actuator.
Valve #, 6, 8
Network
Communication
(Fault)
“FAULT: V# NET
COMM”
Actuator lost communication with Control Interface.
Check for an intermittent control cable connection at both ends. On the actuator end, check for
a solid ON green power light and a blinking red status light. A green diagnostic light will blink 0,
1, 2, or 3 times per second indicating its valve number. (The green diagnostic light of Valve #0
will not flash on.) The yellow service light should not be turned on.
Valve #, 5, 6, 8 Commission
“ALARM: V#
COMMISSION”
Actuator was not commissioned and the burner management system is issuing a command to
modulate the burner.
Commission the valve as described in pages 10-30.7-61 through -63.
Valve #, 7, 8 Swap “ALARM: V# SWAP”
Actuator was replaced (or swapped) on a commissioned system without performing the re-
commissioning procedure.
Re-commission the alarming valve using Command A-4, Commission Valve, as described in
Reference Table 12.