Daikin FC Series - Page 33

Blinking Fault Codes... (continued)
Code 5-2
*High Fire Sw.or Low Fire Sw.*
Either High Fire Switch or Low Fire
Switch failure.
a. Check wiring and correct any errors.
b. Reset and sequence the relay module.
c. Use manual motor potentiometer to drive
the motor open and closed. Verify at motor
switch that the end switches are operating
properly. Use RUN/TEST switch if manual
potentiometer is not available.
d. Reset and sequence the relay module.
e. If the fault persists, replace the relay
module.
Fault Code System Failure
Code 5-3
*Man-Open Sw.; Start Sw. or
Control ON*
Man-Open Switch, Start Switch or Control
On in the wrong operational state.
a. Check wiring and correct any errors.
b. Make sure that the Manual Open Valve
Switch, Start Switch and Control are
operating properly.
c. Stat Switch held ON too long.
d. Reset and sequence the relay module.
e. Reset and sequence the relay module.
If the fault persists, replace the relay
module (RM7838A1014; RM7838B1013 or
RM7838C1004 only).
Code 6-1
*Internal Faults*
Relay Module self-test failure.
a. Reset and sequence the relay module.
b. If fault reappears, remove power from
the device, reapply power, then reset and
sequence the relay module.
c. If the fault persists, replace the relay
module.
Code 6-2
*Internal Faults*
Relay Module Self-Test failure.
a. Reset and sequence the relay module.
b. If fault reappears, remove power from
the device, reapply power, then reset and
sequence the relay module.
c. If fault does not repeat on the next cycle,
check for electrical noise being copied into
the relay module through the external loads
or possibly an electrical grounding issue.
d. If the fault persists, replace the relay
module.
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