OWNER’S MANUAL
MODEL DH1-1010 SERIES – HEATED HOLDING UNIT
174830 RV101917
Copyright © 2017 Marshall Air Systems, Inc.
All Rights Reserved.
5
3.
Inspect the condition of the control overlay. If damaged, have it replaced.
TROUBLESHOOTING CHART
Before trouble shooting is started: check unit is plugged in, check for tripped circuit breaker and check
that power switch on.
** DISASSEMBLING HEATER VOIDS WARRANTY **
PROBLEM
POSSIBLE CAUSE
SOLUTION
1. CONTROL
DISPLAYS “PH
t”
A. NORMAL OPERATION
CABINET HAS NOT
BEEN ON FOR 20 MIN
A. WAIT 20 MINUTES
B. INADVERTANT POWER
DISRUPTION IF SWITCH
TURNED OFF BY
ACCIDENT, POWER
DISRUPTION BY
THUNDERSTORM ETC.
B. PRESS AND HOLD DOWN
ARROW FOR 3 SECONDS TO
CLEAR “PH
t
”
CYCLE
2. UNIT WILL NOT
TURN ON
A. UNIT UNPLUGGED
A. PLUG IN UNIT
B. IS CONTROLLER
ON/OFF SWITCH “ON”
B. TURN SWITCH ON
C. OUTLET HAS NO
POWER
C. CHECK CIRCUIT BREAKER
D. CORD DEFECTIVE
D. REPLACE DEFECTIVE CORD
E. DOES POWER SUPPLY
BOARD HAVE 120V
INCOMING
E. REPLACE SWITCH
F. DOES POWER SUPPLY
BOARD HAVE 8.5 VDC
OUTGOING TO
CONTROLLER
F. REPLACE POWER SUPPLY
BOARD
G. BAD CONTROLLER
G. REPLACE CONTROLLER
3. UNIT NOT
HEATING
A. HEATER IS TURNED
“OFF”
A. SEE “PROGRAMMING USER
LEVEL” SECTION TO TURN
HEATER ON
B. WIRES NOT PLUGGED
INTO BACK OF
CONTROLLER
B. PLUG WIRES INTO
CONTROLLER
C. NO VOLTAGE TO DC
SIDE OF SOLID STATE
RELAY
C. LOOSE WIRES, REPLACE
CONTROLLER
