65
N. DIAGNOSTICS
Alarm Codes - Heating Only
CODE
DESCRIPTION
FAULT LEVEL -0, 1, 2, 3*
0
STANDBY
None
F
CONTINUOUS FAN
None
h
GAS HEAT ON - LOW-FIRE
None
H
GAS HEAT ON - HIGH-FIRE
None
11
FAILED IGNITION
Problem
12
LO FLAME SENSE
Warning
13
FLAME LOST
Problem
14
UNEXPECTED FLAME
Shutdown
15
HIGH-FIRE GAS VALVE IMPROPER VOLTAGE
Problem
22
MAIN LIMIT OPEN
Problem
33
MRLC (Rollout Limit) OPEN
Problem
42
INVALID THERMOSTAT SELECTION
Warning
44
LOW-FIRE NEGATIVE PRESSURE CONTROL CLOSED
Problem
46
LOW-FIRE NEGATIVE PRESSURE CONTROL OPEN
Problem
55
High-Fire NEGATIVE PRESSURE CONTROL CLOSED
Problem
57
HIGH-FIRE NEGATIVE PRESSURE CONTROL OPEN
Problem,
Shutdown
61
BLOWER FAULT - NO RUN
Shutdown
97
SMOKE DETECTION
Shutdown
N.2.2. Heating Alarm Codes and
Diagnostics
All Core Command come standard with a
7-segment diagnostic display. During standby
mode with no fault codes present, the display
will read “0” (zero). During normal thermostat
heating, cooling or continuous fan operation, a
letter will be displayed to describe the mode of
operation as follows:
C = Cooling
F = Continuous Fan Operation
H = Gas Heating Operation
When the control senses a fault present, it will
display a code to help in diagnoses. A list of
normal operating codes and potential fault
codes follows:
The method for displaying a two-digit fault is to
display the first digit for one second immediately
followed by the second digit – which is also
displayed for a duration of one second. A ½
second pause is then displayed. Cycle repeats
until the fault is cleared. Each fault is flashed
(displayed) a minimum of two times even if the
fault condition has cleared before the fault can
be displayed twice.
0
Displayed anytime there is no fault present and no thermostat call present
F
Displayed anytime thermostat calls for continuous fan
h
Lower-case “h” displayed anytime thermostat calls for low-fire heat
H
Upper-case “H” displayed anytime thermostat calls for high-fire heat
Normal Operation Mode:
Summary of Contents for Climate Master RGED Series
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