47
MVB Fault Text
Error Display
If there is an active error, then it is displayed as the first item in the Boiler Menu and it is the default display for the control
until the error is resolved.
Table T. Error Display
Error Item
Description and Troubleshooting
OUTLET SEN
Check the outlet water sensor and its wiring.
LIMIT SEN
Check the high limit sensor and its wiring.
INLET SEN
Check the inlet sensor and its wiring.
GAS PRESS
Check PIM wiring.
IGNITION
Reset control, push and release RESET button.
LIMIT TRIP
Boiler temperature tripped the high limit.
FLAME
False flame detected. Shut off gas supply, recycle power.
ID CARD
Identity card, check ID card and wiring.
IGN CTRL
Internal control fault. Reset power, replace control.
DELTA T
Temperature difference between the inlet and outlet exceeded the set point. Check water
flow.
LOW 24VAC
Low 24 VAC power. Check power supply wiring and transformer.
BLOW SPEED
Blower speed out of range. Check blower wiring and blower.
A
WARNING:
Do not use this appliance if any part has
been under water. Improper or dangerous operation may
result. Contact a qualified service technician to inspect
the boiler and to repair or replace any part of the boiler
that has been under water prior to placing the boiler
back in operation.
A
WARNING:
When servicing or replacing any
components of this unit be certain that:
• The gas is off.
• All electrical power is disconnected.
A
CAUTION:
If overheating occurs or the gas supply
fails to shut off, do not turn off electrical power to the
circulating pump. This may aggravate the problem and
increase the likelihood of boiler damage. Instead, shut
off the gas supply to the boiler at the gas service valve.
A
CAUTION:
Wiring errors can cause improper and
dangerous operation. Verify proper operation after
servicing. See wiring diagram.
A
DANGER:
When servicing or replacing components
that are in direct contact with the water, be certain that:
• There is no pressure in the boiler. (Pull the release
on the relief valve. Do not depend on the pressure
gauge reading).
• The boiler water is not hot.
• The electrical power is off.
Summary of Contents for Raypak MVB 1003A
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