Troubleshooting guide (cont) – Carrier 16DF013-050 User Manual

Page 56

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

PC 211

Catalog No. 531-603

Printed in U.S.A.

Form 16DF-1SS

Pg 56

801

5-92

Replaces: New

Book 1

Tab

TROUBLESHOOTING GUIDE (cont)

PROBLEM/SYMPTOM

PROBABLE CAUSE

REMEDY

Abnormal stop
(fault code
displayed with
alarm buzzer)

Code “E01” (cooling only) —
low chilled water temperature
at or below 39 F (4 C)

Verify that chilled water low temperature cutout opens at
factory setting of 39 F (4 C) (see Check Low Chilled Water
Temperature Cutout section, page 35). Also verify that
the capacity control low-temperature limit turns the burner off
at no less than 41 F (5 C ) (see Machine Controls,
Automatic Capacity Control section, page 31).

Code “E02” — Low chilled/hot water
flow, or chilled/hot water
pump interlock(s) are open

Verify chilled/hot water pump is running, discharge pressure
is normal, valves are correct, and piping strainers are clear.

Code “E03” (cooling only) —
Condensing water pump
interlock(s) are open,
or low flow when flow switch
is used

Verify condensing water pump is running, discharge pres-
sure is normal, valves are correct, and piping strainers are
clear.

Code “E04” — Solution or
refrigerant pump motor overloads
or high motor temperature
switches

Press overload relay reset button if overload has tripped.
Check overload setting, motor run amps, pump discharge
pressure, and motor temperature. If solution pump has tripped,
check for solidification.

Code “E05” — High-temperature
generator, high solution temperature,
or high pressure

Verify high-stage generator limit settings of 338 F (170 C) for
strong solution temperature and –0.8 in. Hg (–20 mm Hg) for
maximum pressure, and check switch operation.
For cooling operation, check cooling water for high temper-
ature or low flow. Place the dilution switch in MANUAL for
about 3 minutes to dilute and cool the solution.
For heating operation, verify the machine switchover valves
are fully open.

Code “E06” — High flue gas,
fire tube, or refractory temperature

Verify temperature limit settings for exhaust stack and fire
tube are at 572 F (300 C) and the refractory is at 302 F
(150 C), then check switch operation. Check for dirty
generator tubes or damage to return end cover refractory.
Adjust burner controls or repair refractory if necessary.

Code “E07” (cooling only) —
High absorber weak solution
temperature

Verify absorber weak solution temperature above 113 F
(45 C). Check for low cooling water flow or high tem-
perature. Also check for poor absorber heat transfer
(dirty tubes).

Code “E08” — Burner ignition failure

See Cause and Remedies under Burner Misfire on Ignition
Attempt.

Code “E09” — Burner operation failure See burner manual for correction instructions.
Code “E10” (optional) — External
limit device

Determine what condition is being sensed and the cause of
the fault.

Code “E12” — Chilled/hot water pump
interlock open but flow switch is closed,
or vice versa

Check chilled/hot water pump operating status and interlock,
flow switch operation, valves, and strainers.

Codes “E13 through E34” —
Sensor error, out of range

Have sensors checked and calibrated.

Code “E90” — Insufficient
shutdown dilution

Repeat dilution cycle by depressing Start then Stop buttons.
Determine reason for inadequate dilution.