Midmark M9 - C560

SECTION II
TESTING AND TROUBLESHOOTING
© Midmark Corporation 2002 SF-1803 Page 2-12 Printed in U.S.A.
Code C560.
(Error Type: FATAL )
Note: When a Code ends in
“0” it means unit had a sup-
ply power interruption.
The operator could have
unplugged the unit when a
previous Code was dis-
played.
Always go to Service Diag-
nostics and check previous 5
codes that are displayed.
C560: POWER UP MODE
STEAM TEMP HARDWARE
UNPLUG / RE-PLUG UNIT
Steam A / D converter
reports an average value
outside the limits for nor-
mal operation during
POWER UP mode.
May be due to a malfunc-
tion that occurred previ-
ously to Code displayed.
Go to Service Diagnos-
tics and check previous 5
displayed codes.
Refer to Code Numbers in
Troubleshooting Guide to
determine correction.
Steam Temperature
Sensor (RTD) unplugged
from P.C. Board at J12
pin connector.
Check condition of
Steam RTD plug on P.C.
Board. (Refer to P.C.
Board Schematic in Sec-
tion 5).
Assure Steam RTD plug con-
nector is secure.
Steam Temperature Sen-
sor (RTD) malfunction-
ing.
Remove plug connector
at J12 on P.C. Board and
check resistance value
(ohms) of RTD between
white and red leads.
Resistance values
should be between the
following:
75°F (23°C) = 1090
ohms.
545°F (285°C) = 2066
ohms.
Above values +/- 10
Ohms
If Steam Temperature probe
shows open or values outside
resistance ranges replace
probe (Refer to para 4.10).
Main P.C. Board Mal-
functioning.
Check for 5.0 VDC
between TP2 & TP4.
Remove plug connector
at J12 on P.C. Board
and check voltage on
pins 1 & 2.
Voltage should be apprx.
4.5 VDC at all times with
unit plugged in. Also, run
Service Diagnostics.
If voltage is not present or Ser-
vice Diagnostics reveals a
problem replace P.C. Board
(Refer to para 4.13).
Code
C561 SELECT
Code
C562 FILL
Code
C563 HEATUP
Code
C564 STERILIZE
Code
C565 VENT
Code
C567 DRY
(Error Type: FATAL )
(Refer to column on left for
codes and description)
C56X: XXXXXX MODE
STEAM TEMP HARDWARE
UNPLUG / RE-PLUG UNIT
Steam A / D converter
reports an average value
outside the limits for
normal operation during
specific mode.
Steam Temperature
Sensor (RTD) unplugged
from P.C. Board at J12
pin connector.
Check condition of
Steam RTD plug on P.C.
Board. (Refer to P.C.
Board Schematic in
Section 5).
Assure Steam RTD plug con-
nector is secure.
Steam Temperature
Sensor (RTD), malfunc-
tioning.
Remove plug connector
at J12 on P.C. Board and
check resistance value
(ohms) of RTD between
white and red leads.
Resistance values
should be between the
following:
75°F (23°C) = 1090
ohms.
545°F (285°C) = 2066
ohms.
Above values +/- 10
Ohms
If Steam Temperature probe
shows open or values outside
resistance ranges replace
probe (Refer to para 4.10).
Main P.C. Board Mal-
functioning.
Check for 5.0 VDC
between TP2 & TP4.
Remove plug connector
at J12 on P.C. Board
and check voltage on
pins 1 & 2.
Voltage should be apprx.
4.5 VDC at all times with
unit plugged in. Also, run
Service Diagnostics
If voltage is not present or Ser-
vice Diagnostics reveals a
problem replace P.C. Board
(Refer to para 4.13).
Table 2-3. Troubleshooting Guide
Problem Display / Symptom Probable Cause Check Correction
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