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Run Test Troubleshooting —
is a diagnostic tool used during unit start-up. Table 17
describes troubleshooting specifically for the automated run
test.
PROBLEM
Control modules do not have lights when unit power on.
Control display does not light up when unit power on.
Run test will not start.
WARN (yel) does not light during run test.
ALARM (red) does not light during run test.
Run test stops, ALARM (red) light is lit after it blinks once.
Fan does not start/ALARM (red) blinks 2 times.
Run test stop, ALARM (red) light is lit after blinking 3 times.
Run test stop, ALARM (red) is lit after it blinks 4 times.
Fan does not increase speed.
Fan does not stop after ALARM (red) blinks 5 times.
Fan rotation is backwards.
Run test stop, ALARM (red) is lit after blinking 6 times.
Compressor 1 does not start.
Run test stop, ALARM (red) is lit after blinking 7 times.
Compressor 2 does not start.
Run test stop, ALARM (red) is lit after blinking 8 times.
Compressor 3 does not start.
Run test stop, ALARM (red) is lit after blinking 9 times.
Compressor 4 does not start.
Compressor rotation is backwards.
"C" message in I/O status display.
"Service" message in I/O status display.
"Supervisor" message in I/O status display.
ALARM (red) always on, will not enter run test.
Forcing and Clearing an Input or Output —
ing unit operation and/or troubleshooting, it may be necessary
or desirable to clear an input or output. Tables 18 and 19
describe the procedure for clearing inputs and outputs.
1. Press 3, SET, ENTER
2. Press ENTER
3. Press 1111, ENTER
4. Press STAT
5. Press ENTER
6. Press down arrow to obtain desired item
7. Key in force value (1=on/start, 0 = off/stop), ENTER
STEP # INSTRUCTION/ACTION
1. Press 3, SET, ENTER
2. Press ENTER
3. Press 1111, ENTER
4. Press STAT
5. Press ENTER
6. Press down arrow to obtain desired item
7. Press CLEAR, ENTER
TROUBLESHOOTING
Refer to Tables 17-21 for troubleshooting information.
The automatic run test
Table 17 — Run Test Troubleshooting
Dur-
Table 18 — Forcing an Input or Output
STEP # INSTRUCTION/ACTION
Table 19 — Clearing a Forced Input or Output
POSSIBLE CAUSE
Transformer open. Circuit breaker open. Power wiring open. Module failure.
Connection location. Interface cable open. Display failure.
Pre-existing ALARM (red)? Not "Logged in" with password.
Switch not in Local.
Wiring open. Lamp failure. Control module failure.
Wiring open. Lamp open. Control module failure.
Bypass switch to LINE. Mode switch to OFF. Duct high
pressure switch open. Fire shutdown input or jumper open.
Supply air temp out of range. Duct static pressure sensor out of range.
Compressor resistor board wiring error or failure.
Fan relay failure.
Wiring open. VFD connection error. VFD setup error. Fan relay failure.
Current isolator failure. Control module failure.
VFD connection error. VFD setup error.
Current isolator load adjustment too low.
Fan relay failure.
VFD to motor wiring sequence error. VFD setup error.
Wiring open. Compressor resistor board wiring error or failure.
High-pressure switch, low-pressure switch, coil frost switch,
or compressor protection module open. Compressor relay failure.
Contactor failure. Control module failure. No refrigerant charge.
Wiring open. Compressor resistor board wiring error or failure.
High-pressure switch, low-pressure switch, coil frost switch,
or compressor protection module open. Compressor relay failure.
Contactor failure. Control module failure. No refrigerant charge.
Wiring open. Compressor resistor board wiring error or failure.
High-pressure switch, low-pressure switch, coil frost switch,
or compressor protection module open. Compressor relay failure.
Contactor failure. Control module failure. No refrigerant charge.
Wiring open. Compressor resistor board wiring error or failure.
High-pressure switch, low-pressure switch, coil frost switch,
or compressor protection module open. Compressor relay failure.
Contactor failure. Control module failure. No refrigerant charge.
Field power wiring sequence error. Compressor power wiring sequence error.
No input signal/communication failure.
Value is forced from 6400 keypad entry.
Value is forced from network communication (i.e., PC).
SAT, DSP, CSMUX, DHS, or PHASE input values out of range. Mode switch OFF.
"Controller Password"
"Log in to Controller" "Enter Password"
"Log in to Controller" "Logged in"
"Hardware Points"
"Supply Air Temperature"
(NOTE: order is PCB1 I/O, PCB2 I/O, PCB3 I/O)
force value/status "Service"
RESULT
"Controller Password"
"Log in to Controller" "Enter Password"
"Log in to Controller" "Logged in"
"Hardware Points"
"Supply Air Temperature"
(NOTE: order is PCB1 I/O, PCB2 I/O, PCB3 I/O)
auto value/status (NOTE "Service" must be gone)
27
RESULT
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